Malicious PDF — malware analysis report

Static analysis result for SHA-256 031587859a7ab1d6…

MALICIOUS

PDF

67.3 KB Created: 2021-03-14 17:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 063ed2fd37e3134e45a51d5bb1350a99 SHA-1: c4e643646714bbabe51131eb1b2daaf743937c01 SHA-256: 031587859a7ab1d638989bce1b4c20eb88e579d7ab9e6dee9f91ca31562e1f05
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a suspicious URL points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=business+process+analysis+geoffrey+darnton+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376610/normal_6007e09757227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5fd0d9de1e5f7.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/ravenloft_5e.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/82251032450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fdff4ea426f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454042/normal_604200dc85939.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/83953408028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_2597ec47d45843c5819a205e164e6169.pdf?index=trueIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_98009f9c770b498889033f337b32e78c.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_26485118812a4aa886250c0ec0ef017a.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_cb18fc59f9144a058d41cc03481feadc.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_d1fedebc34204fffb522bbbc0c790a39.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_fa04461d9f854da0a1eb46ea77272037.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/piya_more_video_song_1080p.pdfIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_07539702f29c437e9250e812566ece84.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_aee8fc8c64db4c90887e5e1ff0147555.pdf?index=trueIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_c840230c92ae4669934d092cc0afdf9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/gijoxagenoje.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/29486623285.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/welirinurerap.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_off0000ca7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7A 5476 bytes
SHA-256: 1680b7abaa76b9a256452838a38661f5a1891ba41e64f5562b8abfb792211543
font_01_sfnt_off0000dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD36 9976 bytes
SHA-256: 268550ee16efd0b8451c114b740a08508d0459fca214ea754529a94817c02047

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