Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e40267f53d6290e…

MALICIOUS

PDF

73.6 KB Created: 2020-12-29 20:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4ba3bad251c1aa6818e103b479222784 SHA-1: e1c4d0fe87dffc1700bd30e9e903b86896cb8541 SHA-256: 5e40267f53d6290ee2ad7639514db1ee836376b504897d2e0d04a2c05a7f713c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it functions as a link farm or redirector, likely for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting malicious sites.

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://trafffe.ru/strik?utm_term=mcat+score+range+percentile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1045de861b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5fe2091dd1423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_5fea2f007dd09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f9313355b454.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/c4888d02c.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/gefosujibofat-vubexozibeze-redugijoxidafeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fa8674e2e49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5faeeb215b059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8827f6ec537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8c799f0ebb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_5fa7a84f65043.pdfIn PDF document text
    • https://kugakisan.weebly.com/uploads/1/3/4/3/134390280/9941463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_5fbf1b579903f.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/zokokamu/bloodstained_ritual_of_the_night_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/fivenoxej.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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5104 bytes
SHA-256: c24a47c2244d8c422747d61a5125088df319eb6ecb70ae5618f950cf3b183e86
font_01_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 11104 bytes
SHA-256: 61c5b1342cfc8bd3c896345facfc23b9b55442595b497d8816827ce163d1211e

Open this report in the interactive analyzer, or submit your own file for analysis.