Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9ea57b54a8167…

MALICIOUS

PDF

81.1 KB Created: 2020-12-25 16:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 581cd155bcc76529c308c99303ff4cc9 SHA-1: e3dfe8b297e5b22711d0a4cbf03f6ed78c92331d SHA-256: 7cb9ea57b54a81675a12c3a2a442589d32f5f7f9848cec418003ce023055e454
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to lure users. The primary link, 'https://trafftec.ru/strik?utm_term=download+game+hello+neighbor+hide+and+seek+apk', is identified as a redirector for a free-download phishing lure. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to deliver a malicious payload or redirect the user to a phishing site, likely via embedded JavaScript.

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://trafftec.ru/strik?utm_term=download+game+hello+neighbor+hide+and+seek+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f8e4ff14e9e7.pdfIn PDF document text
    • https://cdn.sqhk.co/xalurubizud/icjiggp/70848489208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5fa670aa5e6b6.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/jjRjcWv/griselda_blanco_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/T7hhaja/muxijomuzijep.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/xumaturu-wojotajifu-logupegorex.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/gvibbhe/wurivagogimawevo.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/foAhjXj/ladowobix.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/haOjgji/rebazisike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485172/normal_5fcbe2811e0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/qhggchd/52538107665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5fadd6be1cf32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5fb5b26422625.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/donake/circle_theorems_questions_and_answers.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 1

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_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 5668 bytes
SHA-256: 5ea7ac8c55ee4628ca4916d549c5ddebb664f88646070261871f102f78efecdd
font_01_sfnt_off00011374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 10596 bytes
SHA-256: 034a34d31b8beee38c9841bc8d2b1b7136be001a01416ba3eceb7c7bc68a2287

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