Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee782beb6634364d…

MALICIOUS

PDF

100.3 KB Created: 2021-03-18 16:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 587f26d3bce27cce9e7b3ad731408b86 SHA-1: d32711fb6eebc492244176e5705917692e59d49c SHA-256: ee782beb6634364dddf23b8f90dda128f47e658edd9e9e1b8978715db419f3f2
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 0.9986

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://zajinet.ru/strik?utm_term=is+tom%2527s+guide+trustworthy PDF link annotation
    • https://zuligaxexepe.weebly.com/uploads/1/3/0/7/130775912/bd276a68.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/fodebafurulasi.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/difiiij/32503617747.pdfIn PDF document text
    • https://saniruguroxi.weebly.com/uploads/1/3/4/5/134585545/kexobirabenex.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/QahayRw/25587340736.pdfIn PDF document text
    • https://cdn.sqhk.co/juzexokogim/jbxxhwm/jimikifab.pdfIn PDF document text
    • http://insurancesouk.com/my_little_lamb_cradle_n_swing_instructionsu98au.pdfIn PDF document text
    • http://creditscorefix.info/306788930obqdv.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/pojarof.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/gggfYvY/best_color_splash_app_for_android_2018.pdfIn PDF document text
    • https://gebifulud.weebly.com/uploads/1/3/0/7/130775692/48c555e921.pdfIn PDF document text
    • http://triple-doska4.club/wurobufubejesejidoxaaukmo.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/jexubes.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/99865.pdfIn PDF document text
    • 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://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_75d070dd8f93498c92fde20c85ee2b21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/lulup.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_be3dd257c3f84cea979afe6c6824f090.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_c8d58b532e87400fa7636d09c00d5f47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/xofunotavatazofimag.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d1fb1a466b9940da899c1e4adb529f91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/golepe/bourree_dance_and_performing_arts.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_727776355e6c4e6da5acb04c3933f114.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 4936 bytes
SHA-256: 5a21a914452fffd25df27b3e124b0064b4f57b9d3ef4ea95ac5752daaa21bb75
font_02_sfnt_off0001356f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 11988 bytes
SHA-256: b766ce2f75935db20cda8b50e36a966d1e3a0c7595c166eebcfad4a59c2c6a5f
font_03_sfnt_off00015e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E09 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_04_sfnt_off00017339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17339 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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