Malicious PDF — malware analysis report

Static analysis result for SHA-256 53777c82467cd37c…

MALICIOUS

PDF

91.1 KB Created: 2021-01-26 12:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ba3c266d2d8e78a22efed15e4ef708be SHA-1: 94a95648ded84b5dd212e3570b39be0e5a32ed5d SHA-256: 53777c82467cd37c4a9b6a29fd97d5d95f3ec962d32d8b31446db6aa5fe7da42
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, with several pointing to unknown or potentially malicious domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

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://trafffi.ru/123?utm_term=gideon+from+criminal+minds%25EF%25BF%25BC PDF link annotation
    • https://fuvobavan.weebly.com/uploads/1/3/1/6/131637325/4599548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_60044553e90ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_600a68edaf737.pdfIn PDF document text
    • http://libertinemodels.com/metal_madness_pvp_car_shooter_twisted_actionn0fi7.pdfIn PDF document text
    • http://beremoter.online/xmeye_setup_android0ylh0.pdfIn PDF document text
    • http://afracheat1.xyz/votukutuvonaxarubaxulojr3hg5.pdfIn PDF document text
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/1735469.pdfIn PDF document text
    • https://sazuwigigaxav.weebly.com/uploads/1/3/1/4/131407293/fotomodirobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_600dc5ab7e229.pdfIn PDF document text
    • http://bazis-rostov.com/974175715098ra00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fc9befe322eb.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/jinabisura/be_alright_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/balancelle_de_jardin_forme_oeuf.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/capstone_mining_2017_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/guided_reading_activity_7-_1_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lidojaxonas.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/87300795231.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_off00012742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12742 5204 bytes
SHA-256: 465370cab98f18957ac0b96bfc56ca7a606a53ce990fb57aa3e74a205c87f675
font_01_sfnt_off000138e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E4 10680 bytes
SHA-256: c30e16ba41aef54cdb7da7a3fa800306a019f02bd8034eff1bf4ba00e5641883

Open this report in the interactive analyzer, or submit your own file for analysis.