Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1ae6ab94495559…

MALICIOUS

PDF

70.6 KB Created: 2020-11-18 12:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 07fe2fdf372187cdc7fbeddfa469859a SHA-1: b4d788dddd13fcb5452bc9eb249cdefaca60fae1 SHA-256: 1c1ae6ab94495559b5a30dd6d584985105f17cee963d320de65d4a5585152f64
196 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, including a link farm and a redirector URL, suggesting a malicious intent to direct users to external sites. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/aws?utm_term=fda+establishment+inspection+report+database PDF link annotation
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/gisabel.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/wuwitadexulotafosuni.pdfIn PDF document text
    • https://kijatuvoriwoze.weebly.com/uploads/1/3/4/3/134352029/kiviza_fagixenewibo_banabomadosi_tadoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fb4d9cc06184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_5f95ca496a93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f894c2b6d90b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fab9ab29c92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f89a5f1dc562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f99270627a79.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
    • https://s3.amazonaws.com/felasorarabipis/26483260527.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/dufipezevarigokidutute.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/sanawawo.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/54549673834.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/54775942811.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/93937782105.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_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 5196 bytes
SHA-256: 525fb9f341b8e3a29a0d6b596fd0c29d49acaebe892e37f05fa6de8ddbf2d7a7
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 10512 bytes
SHA-256: b299a0cbb06331d26b4ae04ed321822001c22740db7c6f3e2bbbbb24be7834ea
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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