Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dccc760d506e673…

MALICIOUS

PDF

81.4 KB Created: 2021-05-12 08:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ba6cb295f93db7dd0e34a57953132ca8 SHA-1: 994bfe0550a473c738ac33eef2f0031734535bb6 SHA-256: 9dccc760d506e673401c62d6e93f71403a9820cd18db0f62b2439e4fdf87ecb8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a significant number of external links, suggesting it functions as a link farm. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially malicious or deceptive websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://crophysi.ru/strik?utm_term=can+you+use+turtle+beach+stealth+300+on+pc PDF link annotation
    • https://cdn.sqhk.co/nowovadizeb/aPTiags/double_gun_journal_volume_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ffe5163551fa.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/wotigatedudiza.pdfIn PDF document text
    • http://avbox.org/28971076061kba5l.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/84Fqjbd/sivuzenil.pdfIn PDF document text
    • http://daddytestit.xyz/bemubejogo5vqzq.pdfIn PDF document text
    • https://cdn.sqhk.co/xixofivib/iVjZhj3/19788109651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_60117c38d18c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450148/normal_5fc9530f8ebbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_60206fa535a4d.pdfIn PDF document text
    • https://nazutusimeraj.weebly.com/uploads/1/3/4/8/134883567/2102479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_604ede56ee248.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/hern5Sr/money_express_provo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501231/normal_5fda447504731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_5fd1262da7896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_602b546f0d760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_600f40e266591.pdfIn PDF document text
    • http://navaram.online/genetics_from_genes_to_genomes_5th_edition_free_downloadiudkg.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/65bggjK/50414258940.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/kakekojezutok/8574424637.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/how_to_block_calls_on_cordless_phone.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_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 5476 bytes
SHA-256: 3f258d3974d1b370936ace85c1e63ebc3d3e0ba159801da32766b3f1bfcdd07d
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 10784 bytes
SHA-256: 5ee0c86913b72142501d4c922ff796fd095df45046a008af41f263685bf16f07

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