Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c3755dc4b4941…

MALICIOUS

PDF

95.7 KB Created: 2021-03-02 05:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f6140b2d89b338f96d666313ceb0c27e SHA-1: 14db9d4ba3f57c365214ca659754b743f279413a SHA-256: 094c3755dc4b49418d03d21a3729779b425f86e7f462c313bc48340f902d0068
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant number pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The document body, though partially garbled, contains keywords related to historical topics, likely serving as a lure to disguise the malicious nature of the embedded links.

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 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.
  • 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://pelibifir.ru/wix?keyword=what+caused+the+fall+of+ghana PDF link annotation
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/puwuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478125/normal_5ff047cd1fc74.pdfIn PDF document text
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/5054581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377112/normal_5ff354464d637.pdfIn PDF document text
    • https://xenonomexe.weebly.com/uploads/1/3/5/3/135386884/6551461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5fe43b0843973.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/ginoxutuduzotu-gemowonexawojar-kotixelotuxomok-midavibilevif.pdfIn PDF document text
    • https://kovajokuluvemu.weebly.com/uploads/1/3/5/3/135335912/b07bd6.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/Fhbp5he/pilir.pdfIn PDF document text
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/newonu_sadewumawip_jomof_gotijikegi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novifamigot/cool_jazz_font_for_huawei.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/29428614033.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/16322351073.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/cal_poly_club_sports_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/pegabamogaxejepazodejokin.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/birthday_party_invitation_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/48810242413.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/evan_almighty_full_movie_free.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_off000139b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B1 5200 bytes
SHA-256: 5fc909378b15c0691d4dbe056089bce34cc581c34d222b93b5a7b0a9c0464bab
font_01_sfnt_off00014b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B72 11300 bytes
SHA-256: f8a89cd8796621861fcd6796e0d671651f4f8b3574f4ac95b04aa3713e418498

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