Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cde8a3d28d16e3c…

MALICIOUS

PDF

64.5 KB Created: 2021-01-04 20:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 32d4bee3121d8840594a0a80e5cac5d9 SHA-1: 911d8e3ef84b604348e6cb7272ae104ce4d18f82 SHA-256: 4cde8a3d28d16e3c2161e8f72fa9279c749651e561b830b9c7e433f942a648eb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is traffking.ru, which is likely used to host phishing content or distribute further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites, aligning with phishing or malware delivery tactics.

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://traffking.ru/aws?utm_term=destination+b2+pdf+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C PDF link annotation
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/1514125.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/7d08337cc74f72b.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/muloxiwunapa.pdfIn PDF document text
    • https://xosavufubat.weebly.com/uploads/1/3/4/3/134346154/demigotub-tatilanenufa.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/nopojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2cfdb7f-c72a-4530-995f-0a75bb3e3527/injustice_2_game_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/esplanade_hotel_gig_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e90a0e-962c-4497-b5f5-1babf5112eda/sims_4_xbox_one_cheats_disable_needs.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/28142554148.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/template_form_login_bootstrap_4.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/zorunidowilubep.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/rikenujozaradanarexi.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_off0000b21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21E 5808 bytes
SHA-256: 1bacf377858cfd7be6f48fd5b3384f43d062657759e082370596952448bf1378
font_01_sfnt_off0000c572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC572 14644 bytes
SHA-256: 1e3bba5e9f5b85b71de271500cb6c39aaddbed79f44e14bc2433307f5bcedc2c

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