Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b84e69485f3f08…

MALICIOUS

PDF

66.3 KB Created: 2020-11-22 15:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a64af13ad242036b56a26fef99e9ed64 SHA-1: 5cdd76423070b7e6b04cf526d22f94b60de5a39c SHA-256: 27b84e69485f3f08694be562e056454011bed1b94a1626957b112f7a3e241342
156 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, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to drive traffic to malicious or spam sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=athelia+rolfsii+pdf PDF link annotation
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/jopororoxudoza_rapuju.pdfIn PDF document text
    • https://zavadogo.weebly.com/uploads/1/3/4/3/134325895/8798984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fa718d98aa0b.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/1312936.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/5903447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5f975e5aacc83.pdfIn PDF document text
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/lukaxijifemusok.pdfIn PDF document text
    • https://febafowizozijuz.weebly.com/uploads/1/3/4/8/134860945/toreparugi-bivapimazuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f8b5e6282c8a.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/ef81fe639a.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/xalasawu/gopro_hero_plus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/maiya_maiya_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/48376902639.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/encyclopedia_judaica_vol_9.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/stormwrack_d_d_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/xenoblade_chronicles_2_strategy_guide.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_off0000c799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC799 5120 bytes
SHA-256: 1c4eea09eaa3fb4456339ecaf7a29f35440dba6becd29d21721a9678d9c0eab3
font_01_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 10516 bytes
SHA-256: 6b53d643c524ece28bf797be2963fc3743e39640695f8750449ef2012827c3e0

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