Malicious PDF — malware analysis report

Static analysis result for SHA-256 1990694937aeb72f…

MALICIOUS

PDF

72.6 KB Created: 2021-06-11 00:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0a3d351b853457eee680c50649513494 SHA-1: b2af5737d31ff1cac05079df56605415b0f3df70 SHA-256: 1990694937aeb72f963bc84a1cd8ee13d3b58c60437d840ee088ee78618c0d97
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 0.9997

Heuristics 5

  • 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 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://crewmak.ru/pbw?utm_term=how+to+hard+reset+iphone+without+computer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416506/normal_600238937dc19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_6044f77c63a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_60664da248498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402717/normal_60c27daf66432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388040/normal_5fffe9e1091c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_601e0bd18463b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/fundamentals_of_physics_halliday_resnick_solutions_manual_10e.pdfIn PDF document text
    • http://ludagobef.pbworks.com/f/followers_and_unfollowers_apk.pdfIn PDF document text
    • http://fawugomem.pbworks.com/w/file/fetch/144646842/71881086924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4ae5ae-fa73-4725-a2d9-4cf3ff96c39d/g_shock_ga100c-8a.pdfIn PDF document text
    • http://pimepovume.pbworks.com/w/file/fetch/144684531/patelezuparafivewox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eacc840-5a34-4560-9d2e-100bf1589ed0/vikosuditanofugopud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586365d2-160a-4f12-9a16-91ba24572e7f/53390254379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65810413-04d6-4c54-8049-dc06ef796451/51410188829.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/f/dufim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f45d458-3bd9-4e3b-b1be-af61538f4d71/tegudawalewizenapafaluze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2d708a-b398-418a-806e-09fae2b73ef2/zugadilalebikavudarepoden.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144499362/ielts_writing_task_2_sample_sheet.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144737781/lenovo_110s-11ibr_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ef6810-fb68-4578-b4ac-861a6bce504f/wozevuverapakogifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9924db-3795-4562-b004-a1b199e5c2ba/zigufobabe.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_off0000df69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF69 5332 bytes
SHA-256: 05c35763024462ef3c01a146ef9c356b13b0448f11db5f9a970ca7ed8bc38603
font_01_sfnt_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 10384 bytes
SHA-256: 23e073ae3f0a17ccdca66ea977f63d17a73735c06a0880a5d4cc9f9fac2ddf8c

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