Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ace65809bc3b1dc…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 22:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2debb1298397ec4f8d9c3b3eb17ddcf3 SHA-1: c6ee532eb4766f4ad49fe49eb290cd6b13dbd1f0 SHA-256: 2ace65809bc3b1dc278a2799187d0875a8c804f77d98b51a0ed321b6ec621367
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure, utilizing a redirector URL to disguise the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack vector appears to be a phishing attachment, leading users to a URL that likely serves a secondary payload or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=gta+vice+city+cheats+for+skip+mission PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca588c81c37306b3202a9/1626121608774/mauritius_south_africa.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd13f8e89d93564d38821/1626198335299/gta_5_highly_compressed_4mb.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec968d478ebe26bfc7259a/1626117773949/85709551131.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94ce20cbdad4d35071d9a/1625902306253/coc_town_hall_10_hard_base.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec91dc7b14134336dddb70/1626116572822/590365996.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_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 16496 bytes
SHA-256: 9ed0f649dc24d00de10096e9d12c9d6ea05967dbf1bd87fcbff972c211f66fcc
font_01_sfnt_off0000ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10457 11008 bytes
SHA-256: adb4d3838cfa95aae41d6f94c73b8664b56605deb6472d895f2a5af4f5da79ec

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