Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44f9c4b6ed9d19e…

MALICIOUS

PDF

79.1 KB Created: 2021-07-13 17:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1d98768628a4b1e961a813cf845c8c47 SHA-1: 3e3c5e489cc51159eb754d44a21dc713c75e0b7a SHA-256: c44f9c4b6ed9d19e567a15c670fb892a639286a657433373162e716347775ab5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified an external URI and an SEO redirector link, suggesting a phishing or malware distribution lure. Although no scripts were extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into navigating to a potentially harmful URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=how+to+have+a+boy+and+girl+twins+on+sims+4 PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca8f9c81c37306b325a99/1626122489863/kuwerifevexobizenukofiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed899c4918f36a6d61cb3e/1626179997131/how_to_enable_document_rights.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec912c4f2b1c51afa4d63b/1626116397225/zezulojoritilori.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed969beb7cc826ddc52714/1626183323915/top_dps_wow_shadowlands.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9ab2c2b60e0ed5b4bbc4/1626184370712/bokukuxedexidomi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e915d1b68d8f0f4bf7c829/1625888209448/84864954371.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb5faa9a8dd5e31c86e28/1626125818982/59629549283.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 8

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_off0000d219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD219 16844 bytes
SHA-256: 49661a633f1b2476412ff88ee41e1320427c83103a62c1b81338b3afbd3e2bfe
font_01_sfnt_off0000fe21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 11168 bytes
SHA-256: 1aa6c669bcddb76a1f456633dc544e2252728fa3970e06e6b26f4ecc9d627a39
font_02_sfnt_off000117e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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