Malicious PDF — malware analysis report

Static analysis result for SHA-256 94980445f97a6b88…

MALICIOUS

PDF

76.6 KB Created: 2021-05-08 08:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8e322ad5efc43d518b8fc7ee6f5413c8 SHA-1: 5bac97897fb27a35a69f55e038f90dd85ec6c702 SHA-256: 94980445f97a6b88e6c79ba7d4a411e69fd63c21301d5f7b8fa800486027b43f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://botokaw.ru/strik?utm_term=brandsmart+hours+thanksgiving PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410695/normal_6057b5de0253e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_60476e2e2ea81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_606e01421d77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_602883abbc3c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ff839495dd4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_5ff0175e6db4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_604b0683f41e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5ffdf80114215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_603b956aeda32.pdfIn PDF document text
    • http://xofutumokegabix.22web.org/analysis_of_survival_data_cox_oakes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_6066ac576b129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_601e6c1d07384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekamidoku.epizy.com/nitava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3529b1-2584-4dba-9137-68850b9f09f3/taotao_110_atv_starter.pdfIn PDF document text
    • http://zopimejumujodeb.rf.gd/22033928732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a04084c-6d94-4373-9898-2b8c06a4118b/where_does_lemony_snicket_live.pdfIn PDF document text
    • http://wevaxelim.rf.gd/rekoveputaguvasofad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8b4e83-ee2c-4e5a-b881-eb1e5d86a387/5768237064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218f62e1-dfd6-471b-bc84-f13c97573d2c/42592944970.pdfIn PDF document text
    • http://zipokuxabatu.rf.gd/jevuranimome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb22f591-5854-4d16-ad41-82cb08c90b68/salary_of_acio_2_in_ib.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5380 bytes
SHA-256: cb06746ee2421f6135a42a7f7d3b1721691f85078d7d903bd96a02602e3fdd61
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10696 bytes
SHA-256: b2ca3d405967ff864a76ffbca00558f43cd293463144602d3da782667185ac76

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