Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f44062a250835a…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 23:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f381577acd24ff9397f8d825be1bc988 SHA-1: c5503d8f6056ee4e1335263ae5906228aa5b3c9c SHA-256: 45f44062a250835ab9811b6e1d62933d068b1626ca19749267ed312eba9961b8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://maypoin.ru/strik?utm_term=cost+to+replace+salt+cell PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451369/normal_6046396ac0300.pdfIn PDF document text
    • https://misodewegakev.weebly.com/uploads/1/3/4/7/134717908/gotupiluf.pdfIn PDF document text
    • https://tuxazapewim.weebly.com/uploads/1/3/4/8/134846749/suxufel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_6018f7a8e7c98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5feff4ed0a357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_604d3a46c73f2.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/ba7ghhi/photo_collage_ideas_for_wall.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/amhara_national_movement.pdfIn PDF document text
    • https://bokesavuxi.weebly.com/uploads/1/3/0/9/130968985/5563099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5ff9253ce5d18.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/kowuragapiru.pdfIn PDF document text
    • https://falusawo.weebly.com/uploads/1/3/6/0/136084102/jivebigesadolapabam.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/80106185751.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/hBunlgc/sad_tik_tok_videos_status.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/gawabog/southeast_asian_music_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/ncert_mathematics_book_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/53387676430.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/arumbagi_mottagi_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/gutanuwuz.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/13018910970.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/52050521451.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/73369337572.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/18004377046.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 4832 bytes
SHA-256: fa0a8045c4013f3250c7986e8ca76cc003b6a5905e5da229233b5be7f56f2ba5
font_01_sfnt_off0000ffc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC1 10868 bytes
SHA-256: 1e54cb970b0cd52a870417abc1c88356d610c073e5b15df3dbb14d0627217877

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