Malicious PDF — malware analysis report

Static analysis result for SHA-256 1214ca89d7021bc5…

MALICIOUS

PDF

79.8 KB Created: 2020-12-14 09:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 31dae8978344258179d2b6614226b7e4 SHA-1: 23d44ca1c02f470a7d7500ee30c158b191f873e1 SHA-256: 1214ca89d7021bc5bb4c9bf8c92a4a6006deb954a3a859ea92bf86add5c87719
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content that can mask malicious links.

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 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://trafffe.ru/aws?utm_term=how+to+make+a+pallet+platform+bed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476765/normal_5fbfb2b606e76.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/getog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5fa5047dd9f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499023/normal_5fb47f0f6fa27.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/1399454.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/guweberur.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/9308762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5fa422b507504.pdfIn PDF document text
    • https://mosazojuwuz.weebly.com/uploads/1/3/4/6/134669347/4729007.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/7654624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fd1fb186fcc8.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/likadojivivofu/37370615794.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fcbefc1a87f9f1b19c1a333/1607200708058/roxagesozarinoga.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_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 5268 bytes
SHA-256: 3ad2c076803bf0ad7bd27a2a58b491cf0c424cbcac6ec86bb76321bfd07ceac8
font_01_sfnt_off00010e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3E 10600 bytes
SHA-256: 1a12f5e71355c1002d308d7f6d08c7b992064a800e30437e9e2d2dd095bc65af

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