Malicious PDF — malware analysis report

Static analysis result for SHA-256 555c764a37e16c90…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 22:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4df030f6cada701923982718cc909a22 SHA-1: 31e9b2f019dbf5decc0be20178d12011c61ecce3 SHA-256: 555c764a37e16c901708b0a962d2d87fef25642fa7716470ae5a65a6d78f35d0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary external URI pointing to 'https://maypoin.ru/wix?keyword=mupen64plus+ae+3.0+apk', suggesting a lure to a site that may host malicious content or phishing forms. The document's structure and numerous links to disposable domains further support its role as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://maypoin.ru/wix?keyword=mupen64plus+ae+3.0+apk PDF link annotation
    • http://jizimawaguda.22web.org/65090820176.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/gyJieqv/21471844897.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/english_grammar_tenses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_605efa845fb67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_60589c3f2db4c.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/95408888995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367656/normal_5ffec0ae9f62e.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/FriejcO/91910634260.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/ifgdH50/sebefaduzamokomexolig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_604fa0576fd0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_6053773991892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494436/normal_5fefccce10aa2.pdfIn PDF document text
    • http://zatuludarapix.iblogger.org/bopinizo.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/9C5jegE/27336950592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5fddb690ccc5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453718/normal_604a4f544cd5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5ff8c44e13dcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ff5d8832a185.pdfIn PDF document text
    • http://vexizudu.medianewsonline.com/jivikabojafidozofizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60335ad09a61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_605c120391f01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5fc9f098cf8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488092/normal_603df8b823736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_601fd395eb6f4.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukadafimi.rf.gd/zubupawozakezod.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/20409131583.pdfIn PDF document text
    • http://vabizawez.epizy.com/the_ruby_on_rails_tutorial_6th_ed._download.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_off0000e95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 5368 bytes
SHA-256: d261669eae97198475666c3ab4a4a48aaf7c20ae7bd5cb0fe7497364d17879cd
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 10640 bytes
SHA-256: ed70d894deaf41bbab7f1021edf7ca5e04aef0e8ae4e82911c908fa71722d71a