Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f298610710626bf…

MALICIOUS

PDF

111.6 KB Created: 2021-03-28 07:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: baae481684f358728a7f2b4bf10bc672 SHA-1: 9d90a33304cd33cfd0a6c4a5edee4b8989af0100 SHA-256: 3f298610710626bfe3df9edb3dfcdf0938f2226f7be1ce726b6e5076c1011234
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9088

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/wix?keyword=mashallah+in+arabic+translation PDF link annotation
    • http://cmbespaceclient.xyz/sepejepurefunenemawuwitex6ltk4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_601dd7ef50722.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/valijidurubuzakiranaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_60541e92ac5b1.pdfIn PDF document text
    • http://clipshd.design/botifejurujezebowovacyffr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_6038537e867bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_600ea2a3a19a6.pdfIn PDF document text
    • http://shopsmmv.site/tascam_dp32sd_tutorialhsqak.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/cash_flow_from_investing_activities.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/why_is_444_a_special_number.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/23897968824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_603230caac1a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/377b52e4-5803-414a-91bb-20f7334eb366/schlage_connect_touchscreen_deadbolt_change_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f94469-b5db-4d7b-9206-b0245794fc6b/gosalularanatunotugikobi.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_1e47bcef581b4221af2d726c48dbb334.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b235fc8b-7f07-4c2d-a94a-b7a14a03efdf/58726933640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e72768-aca2-47ca-ac6e-26f866fc7c64/rezokovod.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/3399545676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4c5b36-ee0a-4cb4-bce2-a4333d5a79f7/12843653763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3cf884-e733-4611-9643-4b25b9ee7501/nosun.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_99adf7e3bd73419db73ac638570aaabb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f52aa75-f889-4281-84fb-3d2c6429989c/alkaline_diet_food_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4a0d3a-1ec6-4aa6-a527-3a570e8969cd/hp_laserjet_pro_400_mfp_m475dn_toner.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_bbc22aed8988449f8d429677a379713f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c0d1e8-d3f9-4fe5-9168-785aad50f60f/47589831460.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00017b86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17B86 21676 bytes
SHA-256: 70b80b1c8f91ec0e2a71e6ced613056d273744f0b1e13c952cab68139f33572c
font_00_sfnt_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 5684 bytes
SHA-256: e0f0922da2f1b5a441c0ab47f148b203928c2bc4519f23812ab58bc0699b7f5d
font_01_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 5032 bytes
SHA-256: e1bc72d8ffcf3ca3cd76578c63d5b1a1a5e840320a2a60c376d19a9ccd591db6
font_02_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off000123a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A0 2328 bytes
SHA-256: c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24
font_04_sfnt_off00012e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E55 2108 bytes
SHA-256: 806d12f4c18e044784d20764d58024893796e88f204c306662924b3e907cbcac
font_05_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 6640 bytes
SHA-256: 2da83060ad210a9a1743b04a22b2cc5ebb14ba7af64fbaa5f25da2d26a1b3d84
font_06_sfnt_off000149be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BE 16548 bytes
SHA-256: 2850d24a3e5c305c5644c64018ef14a1f187908a606508cacd5a6f6e0260355f
font_08_sfnt_off0001a0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0F1 3276 bytes
SHA-256: c6f56f051084033b0538cdf61e3e457d22b7f2c2ea46d10ec59ebb2b81e63971