Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddccb6569df69bd9…

MALICIOUS

PDF

128.7 KB Created: 2021-07-14 00:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0e6f1a7d49ae4bf6ec9ba187b2a50e6a SHA-1: 467fa3854c5acab255af0e3fecbcbae5195a80e2 SHA-256: ddccb6569df69bd970e3a06435187a83c4a0e74e05194b5a940132aa685b428f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it's a phishing lure, specifically requesting recovery secrets or prompting the user to call a number for security or billing issues. Although no document body text was readable, the presence of these heuristics strongly suggests a phishing attack. The ClamAV detection further supports its malicious nature. No scripts were extracted, so the primary attack vector appears to be social engineering via the document's content and embedded links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4281

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/k6oGaauGqGM/square?utm_term=another+word+for+security+breach PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee00a17ce58f02ed975c71/1626210465702/wipekedosas.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7f5df89f8e700bf6f50b/1626111837301/bojipuvudujeloxodapu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8baaa3be7a25fda2bcd3b/1625864874486/39525872595.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edc2236f11847873592c1e/1626194467930/weightage_of_stocks_in_nifty.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 1

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_off0001950d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1950D 17552 bytes
SHA-256: d42f6cb5539a8ddc56303f44825e7db5d6ab92a1d0614299899dacbf090572ed
font_01_sfnt_off0001c364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB7B 10948 bytes
SHA-256: 2244c532fd356cdf8f3e8a115e116c5d2d92e492c32aaa2dd4e85e393cf3fa61

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