Malicious PDF — malware analysis report

Static analysis result for SHA-256 e232c9517082235d…

MALICIOUS

PDF

88.0 KB Created: 2021-02-15 18:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d5e0003d5896a855fa3952dabc0666e7 SHA-1: d4ca611cb565095e04b3fab4d4a40e69bdc0ba29 SHA-256: e232c9517082235df1fba0682eb1410e087f5be0929ba9c253053ad9c42a9478
186 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, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated, mentions 'Hacksaw ridge screenplay pdf', likely a lure to disguise the malicious nature of the links.

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://bologen.ru/wix?keyword=hacksaw+ridge+screenplay+pdf PDF link annotation
    • http://petrol-v-pol-price.site/review_sheet_27_anatomy_of_the_reproductive_systemlctn7.pdfIn PDF document text
    • http://autobaff.xyz/xexadexc6gnc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_6026d0b6bfd4e.pdfIn PDF document text
    • http://francobusiness.com/dugageddrsqv.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/6914123.pdfIn PDF document text
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/f31f2d6fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/jxgdggB/movie_maker_free_video_editor_mac.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/negokuxopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_6020aa0835734.pdfIn PDF document text
    • http://mifvideo.space/splash_screen_design_psd_freem24xz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_6026bca117c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_602a6f483b37d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mavusovemoritev.rf.gd/blood_type_b_positive_diet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6B 5140 bytes
SHA-256: 75cf530db07499f78833645a7fa4e39455a6513ab3dff564e1ae6c74d8500532
font_01_sfnt_off00012000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12000 10764 bytes
SHA-256: f3f77625f8a76b4dcdf4fe4185ff3a61dab0eca71b8bb1dcc93f5256f96fa81a
font_02_sfnt_off000144bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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