Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca5321b1b449fa5…

MALICIOUS

PDF

112.0 KB Created: 2021-03-19 06:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 289d2395cb5aea5dbeaf65675c814c62 SHA-1: a2deeca4e82fe3a6d3d759d42d20632ad16d98d9 SHA-256: 7ca5321b1b449fa5f1d348bf589cfbaf9820b67804440e169a67d4cc38bb0bd2
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.4688

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 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
  • 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://nipisod.ru/strik?utm_term=doctor+sleep+book+quotes+with+page+numbers PDF link annotation
    • http://fortuneo.best/jogikusuxifolaohlu0.pdfIn PDF document text
    • http://creamwalls.space/tovuxazefalaruxiwodetmnquf.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/587958499639a1k2.pdfIn PDF document text
    • https://xovadesunuzavam.weebly.com/uploads/1/3/4/4/134479636/vubite-vagugonufom-vubaxovope-petugibivixa.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/fulixadulanod.pdfIn PDF document text
    • http://alesyasemiletova.com/how_to_make_a_twin_loft_bed4o0s9.pdfIn PDF document text
    • http://airbin.top/stevens_320_security_pistol_grip_reviewbhm9v.pdfIn PDF document text
    • http://canonsburglake.com/informal_letter_writing_samples_for_grade_5pkq68.pdfIn PDF document text
    • http://policyhelpcenter.com/sdsu_mechanical_engineering_major_requirementsx0v1x.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/c3fc61882c5c1.pdfIn PDF document text
    • http://lnstagramsupportlives.com/an-_x2-_ab-_dhrio_manual_espaol91uhd.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/ramuwujud7s6n7.pdfIn PDF document text
    • http://keepxufi.space/vexibojironiwexiregodelyals.pdfIn PDF document text
    • http://visiblawty.com/vazutijireditivibagoxsguq.pdfIn PDF document text
    • http://artistichomesolutions.com/xoripogapajutun8low.pdfIn PDF document text
    • http://organic-ita.space/11130793226xgken.pdfIn PDF document text
    • https://buvujufa.weebly.com/uploads/1/3/1/3/131379824/7215482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_5a29567747a34690aa73f11c906f24b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farokof/78050746521.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/divamubon.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/android_tv_apps_not_updating.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_31fa839c99804c21b1beaea74b865bcf.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_a44ffa5ef7384d4eb4728fbb0d8eda81.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_d538230f17124d86905375dd8bedf3ea.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_ff0a4f64df5a478fa4842222218b248a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/membuat_cv_dengan_format.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000191eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191EB 5768 bytes
SHA-256: 0dc44cf672f1f944c5b668639a3cfa6c036f82a7222a1bf517176f737b9f0e16

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