Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02719931f821110…

MALICIOUS

PDF

67.2 KB Created: 2021-01-17 22:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca6b69de098f9fd2de65623af14d5ab5 SHA-1: d42613abd9095a58c241b9745e66f25d9c4eb1cf SHA-256: c02719931f821110490166f0eba2e13f08026dbea6dc297dbc264b68a1289ac5
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Wow classic mage talent calculator'. The presence of numerous external PDF links, many pointing to Weebly and S3-hosted PDFs, indicates a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=wow+classic+mage+talent+calculator In PDF document text
    • https://rufewukel.weebly.com/uploads/1/3/4/5/134599372/f0d7e24691b4.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/fubode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5ff2da638bdb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408878/normal_60032bdad6bac.pdfIn PDF document text
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/zatesefejalabuvamiga.pdfIn PDF document text
    • https://febotagi.weebly.com/uploads/1/3/4/7/134728548/602633.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497109/normal_5ff57507a0e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f9979fef0e4c.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/runuzitexokol/ambaji_aarti_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/gekikivevunawasa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/chapter_3_ecosystem_ecology_reading_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/ramadupanomupapikujokogol.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/10807627623.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/downsizing_the_family_home.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/zotofowim.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/38519658024.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/belkin_ac1750_modem_router_manual.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_off0000c8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 5224 bytes
SHA-256: 39a0a7bdbbad0af25c2401c8ba9c1944836ec9ebfcbab17718acc25e93a2f170
font_01_sfnt_off0000da88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA88 11836 bytes
SHA-256: 70e4539ac5c9292a1b7961f11b175e9d2b1cf3ca11212d2beceb6073f3c98076

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