Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10c85d55540f83a…

MALICIOUS

PDF

72.0 KB Created: 2020-12-31 14:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 58e9e455720f5feb32e1809e5204546c SHA-1: 96ad676f4bd172484d29f686f4ca33cbc9b40ef6 SHA-256: d10c85d55540f83ad54a7bda56b102a1c6d9b39bfc97a7e064132aa9cf9786eb
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a PDF link farm and an SEO redirector lure. The primary malicious URL identified is 'https://trafffe.ru/strik?utm_term=blue+red+yellow+balloons', which is likely used to redirect users to a phishing or malware-hosting site. The presence of numerous external links and the ML classifier's high confidence score indicate a deliberate attempt to distribute malicious content.

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
  • 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://trafffe.ru/strik?utm_term=blue+red+yellow+balloons PDF link annotation
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/8309400.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/jhieigQ/bpmn_2._0_tool_free.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fewuwefuvufu.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/bujobugef_bitunox_rifogiruvanape.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/hebhjhh/tifajefuder.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/NjbH0jd/gunnersaurus_rex_sevilla.pdfIn PDF document text
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/6399629.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/hiVhV97/sumoxuvobupiguzawuj.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/69293bd6-660f-421a-aab1-294d49778403/smith_wigglesworth_daily_devotional_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6261a3-52ee-43fb-a553-ebaa0e82acff/teacher_application_lesson_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129465df-234a-41db-989f-2bb8dcba81c5/rujarotun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9cb906-581c-4b94-bede-c9ae87582dbb/jetalezalanuxibewafegodol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbaa058-1764-4a54-8f07-941b8a3cefc8/94176070917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa10cae5-32dc-47f1-9574-e6e1a36a8286/92969143953.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_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 5204 bytes
SHA-256: e6ee47897e2c59c28574954d5d35c5aef986c495b9ab8b01af508f9bc1809b58
font_01_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 10952 bytes
SHA-256: 6fe7e8855bac056fe53f0f6e96297882e249164a8bf29ee9eaffa3987594508a

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