Malicious PDF — malware analysis report

Static analysis result for SHA-256 200855acabc43c28…

MALICIOUS

PDF

68.6 KB Created: 2020-12-27 16:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 762e1547b73abf428091ce21c64ab0ab SHA-1: 9528aaa2ffab5fc4ec65227eb65d2adca46ff7cb SHA-256: 200855acabc43c2855f935bf9d94686551539324e1d0241bce67675fab9175e5
254 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious websites, likely for malware distribution or credential harvesting.

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
  • 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://traffking.ru/strik?utm_term=mario+luigi+and+peach+coloring+pages In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_5fa3accfe50bf.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/aTaijha/sosuxenuxamajuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f91ffb2b7967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f892b8eada64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fa8472f185df.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/vuwejij.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/jhfPha3/jodimibap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5fa5463397cfb.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/f7ge5hb/59760934707.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/tiniruru/jimisodapawediporufevobet.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/christmas_movies_schedule_2018_freeform.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_off0000d10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10E 5340 bytes
SHA-256: 453629d04ca8873a68db6a40bebbfc0e48ac343bdc9727dc4eaa08103774ae0d
font_01_sfnt_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 9992 bytes
SHA-256: b4409753c06386a289a602fbaab7020bc115c2c41ff0bef4e5c2888fea73e699