Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d752dac5305654…

MALICIOUS

PDF

82.4 KB Created: 2021-04-03 13:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d7cc19b91a162415966cb318d311731 SHA-1: 17b7f58b5fb0d2a4077c4699f03e810f5291a540 SHA-256: e0d752dac5305654ddb4f18402dab390caf87d037476f9c683bb05b211ab14bf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=grab+knife+v4+script+require PDF link annotation
    • http://avtoshkola-region26.ru/58572463371ij4v2.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/prior_auth_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_6037db02af511.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://goossyy.online/715118841138nhka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_5ff3bfee08a7b.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/99042146574.pdfIn PDF document text
    • http://boldly-grow.com/vumexavaftdkw.pdfIn PDF document text
    • http://morpeoplelife.ru/what_does_pimp.mean9qcbv.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/tascam_dp-03sd_8-channel_portastudio_manual.pdfIn PDF document text
    • http://podarokinsta.online/fiberiganigamili3e8kh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d016292f-081a-4a17-af0a-c96ad4c983a9/examples_of_safety_goals_at_work.pdfIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/sirovivaxevis.pdfIn PDF document text
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_0a16b3b956c94fe4986304e218c920c1.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_66abf412a2cc478994c7d6d650bb3256.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ef75d9-c40e-47ab-861c-53aae7e85c18/69140481280.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/tukomaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfa038b-333d-461e-99ab-1b4483a0665e/convert_750_cc_to_horsepower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c451e6a4-2d5a-4263-82be-3b1f524f2357/nanda_nursing_diagnosis_list_for_anxiety.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 6476 bytes
SHA-256: 526c5a2175551476bef9e67e23fc16d118bda5f5d89964818a68e3a853678add
font_01_sfnt_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 2856 bytes
SHA-256: ead86d7d525715ae406ad275cfc48f0551e551d9090ef165ec88bed578a437db
font_02_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 5484 bytes
SHA-256: 34b6388853b1eb037657142ea780d95562ea6b754dde8681caaf9c3440e8bf17
font_03_sfnt_off0000ff36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF36 10956 bytes
SHA-256: 9288adffad463f185a4f5b1ea3948c057e7b9a16241bf5d43bf702fc21856766
font_04_sfnt_off000124e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 16564 bytes
SHA-256: 1b3064d3c0f0b479c7b9b364eebd6827088e974478410a5f73c7a61085968465