Malicious PDF — malware analysis report

Static analysis result for SHA-256 627536aa241e99b6…

MALICIOUS

PDF

71.1 KB Created: 2021-01-06 19:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a04fd7705800a8a47bfe7e891e79b38 SHA-1: c47b9ba85e7081fdcd5168da6eb5a5961cfb7a92 SHA-256: 627536aa241e99b649a0b7f9029211b325f7b616e572a8b59e45fb3e2b48fcb0
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links to external resources, many of which point to SEO redirectors and known malicious infrastructure. The presence of a 'download button' lure suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=bossa+nova+guitar+solo+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_5fbf08799b47b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f91ba4d5cbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_5fd3b2649f5c1.pdfIn PDF document text
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/kupirusefuvuxizator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_5fb28bea54ca1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fe2af2eb3f7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5fef451a97f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8f8516bbfde.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/3d54aa2c-e655-4802-805a-98e4540b5ff1/fidadolokotudobuwov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25ef35b-a5f4-4821-b98c-ec7d0da22289/resakopinale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c61f75-729c-481e-8477-df9a1d6631a8/divorce_lawyers_sydney_free_consultation.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_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 5316 bytes
SHA-256: c603c98143f7162fa5a07e948e568fe1a35ce7a902dcb6c3b847077131cee674
font_01_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 10092 bytes
SHA-256: ebbaf6697afc5f0a72edda2430dfd375aa186f665ee01d6cb40fab3a25745cef

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