Malicious PDF — malware analysis report

Static analysis result for SHA-256 9580d06f916cebe9…

MALICIOUS

PDF

78.3 KB Created: 2020-11-25 20:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 465f5e2d76070cab0b56f3405ca67913 SHA-1: 9912813b088d8855a22760099997f97917607c6a SHA-256: 9580d06f916cebe9af48c2d0ee9df4ac452e385a8c38f98e0a3b139a275e45fc
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm and a redirector for 'free-download phishing'. The primary URL, https://trafficel.ru/123?utm_term=sharp+carousel+ii+microwave+service+manual, is presented as a service manual, indicating a social engineering lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://trafficel.ru/123?utm_term=sharp+carousel+ii+microwave+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f980ff7204d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f9b6348bf592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fa6e34a58c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8851c0ae50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f99bc9165c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fa72024cf375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8ca52aeb475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fbd602e1b4be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f93c0834a36d.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/7109830.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/rixubufaxogev-fagewunutokili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f908a05a51dd.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/tejuvonixag/98603556858.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/towokemuvuxagexajomatusa.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_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5428 bytes
SHA-256: 71d666b36594d244cb78d241de8b20c1a29fe5670f187c5d4e090aaf3e8817ba
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 13100 bytes
SHA-256: c4364bb3d736144375bc35b9bba6ba7dc24c68a9ffc854a37fc2520fcdc47e0a