Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5111e042284243…

MALICIOUS

PDF

75.3 KB Created: 2021-07-14 05:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 436e57a45ea2163357ca233b575f83c7 SHA-1: 668e9d966492a8b1493db73c3b97ccce89914428 SHA-256: 3c5111e04228424300210ad6ea281f0b44744f6b78ecd1ae5a8cda31f2245c60
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a URL. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of a redirector URL strongly suggests a phishing attempt designed to trick users into believing they are downloading something legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/CcIy6vlvkUk/square?utm_term=puppy+town+game+real+money PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f114b977dd1475cadfe1/1625813268343/tilifoxotaxevid.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9386cd1a1204f6c97e33/1626116999153/1418104248.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e12cc0906550d907c0d5/1625874732259/mibovuwideginetomujegini.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec92aeb3b63f0898f32cf3/1626116782435/jotiwovuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8edd73b7e7c63344da7a3/1625877975779/70428973218.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62A 16392 bytes
SHA-256: d74298d7a7ab88c72fec1ab2ee5398bfa30b514c2cbab0281ef64b75c8d208a7
font_01_sfnt_off0000f0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 10636 bytes
SHA-256: 3aea571117ad13c091de28ae1de203cac6161409e48aa1668ad6cabc702cac1a

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