Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d39f795ba5a954a…

MALICIOUS

PDF

113.8 KB Created: 2021-03-13 17:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ceca4e1b6fb6149ed1196401212d37c6 SHA-1: 9ba9688a15cc927b2dae47178e16042b2ef068a5 SHA-256: 2d39f795ba5a954ac6f6fc1ba5da1e61bba23c3f9cb7adb1818ddf12a784a39a
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 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=australian+rugby+drinking+songs PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_b7b6ee5f5f5c4f79861102453d965146.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/16233584750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cda4fd3-34c8-4a03-ae67-243f3aced2b2/survival_gear_list_for_alone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876a3f08-34f5-41fe-99b3-e777a2f76f72/votuj.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/37916922612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23d05a8-f025-47d3-a9f0-4f28d1bf7b80/11032380860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a463edfb-e856-4068-bfca-304d059d6bce/1015555134.pdfIn PDF document text
    • http://bimuvugibane.rf.gd/gevilibupiwemawotagegax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090ff347-03b7-4dcd-8d17-bc54d31036d5/what_is_defining_moment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280c0bb6-580a-41d6-9494-da1aa60602fc/dixie_chopper_maintenance.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_d8f010e6638f40349bac319d08ac4d0e.pdf?index=trueIn PDF document text
    • http://nupadamemal.epizy.com/xibow.pdfIn PDF document text
    • http://ronagonisewa.epizy.com/21244607934.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_cc2c450deb8c4f0188de43232206aee4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e8a701-548a-466b-b592-2fa02e41a3e6/froggers_adventures_temple_of_the_frog_gba_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00934f9-d4c5-4769-b8cb-be79e9d09b91/what_are_some_interventions_for_anxiety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40ab994-51ed-4084-b78a-5749ea207840/xbox_360_wireless_controller_pc_software.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/roxomozafuda.pdfIn PDF document text
    • http://jaxirelogalitis.epizy.com/niv_bible_free_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf672d6f-f0db-48e4-beaf-d7b1be1ab20c/merrills_principles_of_instruction_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90a8465-454e-4235-a007-ef04d11b2754/95864377373.pdfIn PDF document text
    • http://wujukigow.rf.gd/whatsapp_plus_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/85122696036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efebd06e-66c8-4bec-86f1-7ed19bf2a947/the_electric_state_book_explained.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C41 5052 bytes
SHA-256: a028d9c1ead3f1c4e5dad9ea3823fbda40d850815bca2eebf74ff9779d07c74c
font_01_sfnt_off00016d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D72 11684 bytes
SHA-256: b520c27953ab82a092fdf827b30861ebd9b98bd84f28cf7252fc64d85a3b3298
font_02_sfnt_off00019584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19584 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off0001aa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA1E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176