Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7700141a825bdd…

MALICIOUS

PDF

72.0 KB Created: 2020-11-20 02:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d7ca476b3dfd23535ef90416012e026 SHA-1: 7ca0e7dcb7072f5d23a94bb5863d9489a6d3cc07 SHA-256: 6f7700141a825bdde3c784e02e88d04f30de5f801bcd9d81f5688604b942cc66
254 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

The PDF contains multiple heuristics indicating malicious redirector links and SEO link farming, aiming to trick users into downloading further content. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit users through deceptive content, likely leading to a phishing or malware download stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://cctraff.ru/strik?utm_term=trane+voyager+troubleshooting+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5fa9d980caa7a.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/37251b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fad31fb022b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428335/normal_5f9a1276570a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fa35941c29f2.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/5105813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8a3e4d594d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f96663a62929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_5fa638ce025a9.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/logunavav_beraleburovege.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/zetare/55202140874.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/south_charleston_high_school_wb.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/aoac_950._46.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 2

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_off0000dda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA6 5352 bytes
SHA-256: ef121941f7104cd0e3f4f1c6f9f99d4e8723cc6874a2057300ab4e0b4cf1ea5f
font_01_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 10228 bytes
SHA-256: 5bd1ac7f20dc455c921255f6fc9aef534ed2baf8f509522169f443156123741e

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