Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac5b2f649300bed…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 19:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 651d47f0625a3135a29c8a26fad9ef91 SHA-1: c27df67ad82d4dca15f02787124d1ffcfd12b95f SHA-256: 7ac5b2f649300bed9f29d598283192719cb4d04fdb0115381e3aa6623153cf1c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/award?keyword=abrasion+dental+tratamiento+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5fd85acab87be.pdfIn PDF document text
    • http://thecabinets.xyz/sazetorjak87.pdfIn PDF document text
    • http://appless.space/fokepegutanbbwy5.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/ledixuvomase_zoludi_raratikumenuko.pdfIn PDF document text
    • http://tuvolabuzibode.iblogger.org/18250977879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_600388d4932d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6059a4f6c6c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fe3688672bfb.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/3435857.pdfIn PDF document text
    • http://vorgazme.com/41189427743w02s0.pdfIn PDF document text
    • https://jevilurusev.weebly.com/uploads/1/3/4/7/134749577/15910a.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/best_spanish_books_in_englishoiv6w.pdfIn PDF document text
    • http://gdztut.com/38243834127aeobt.pdfIn PDF document text
    • http://mebel-albero.ru/rutatibusardq5bl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_601a42b67398c.pdfIn PDF document text
    • http://fdvsefwfrw.space/ielts_reading_strategies_bookps2kk.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/litunux/74986618662.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/27629299555.pdfIn PDF document text
    • http://lemefatunim.rf.gd/android_17_and_18_fusion.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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5316 bytes
SHA-256: f72a2875c502162b930553b1174b7c7203bebfbab96682affce1e74306172adf
font_01_sfnt_off000103ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FF 11088 bytes
SHA-256: e8445d94b8dec56ac45940403c8bc1700ef336221f25548b942380014d0737fa

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