Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d1e811c43b0571…

MALICIOUS

PDF

79.3 KB Created: 2021-07-20 17:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b9a6fd31cc19190ac03ad9ba660e0513 SHA-1: 81b08b0cf889fc55a3cc026a79068a99fcba1dcd SHA-256: 37d1e811c43b0571d4f2e17a24919dc60aa268d1c4d16e275479005c866cb232
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it's a phishing lure, using an image to redirect users to an external URL. While the document body is heavily obfuscated and unreadable, the presence of external URI and redirector heuristics strongly suggests a malicious intent to lead the user to a compromised or malicious site. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/iCUEKX862tE/square?utm_term=bow+wow+the+frog PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6615c3b8c3407e1b0252b/1626759517026/you_cannot_discriminate_against_someone_based_on.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1904031ee6a1029a59c09/1626443840368/75711988963.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91b8bc14ff043cd5cb4f3/1625889675523/health_and_safety_training_post_test_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f57470689a653fd2b07d2a/1626698864382/29150248236.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed1a1250bb312daeca742e/1626151442066/tefekevivixib.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec78e95f604029b9905ddf/1626110185637/lefum.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede2e3e7c05a53525754fd/1626202851280/gupipuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8945297d9a83431c36940/1625855058714/41639021088.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0584a87ee3075eb50ec57/1626363978218/veladu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f67d422fd42108f741e74b/1626766659045/bawawetejitixijumevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92ba60a287971af9a4f64/1625893798628/the_earth_is_the_only_habitable_planet.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9b387c55557fb27d06aa/1626184505102/zakatoromoxudiwijijelila.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3a82fc4d0d61e673c5a65/1626581040110/convert_to_word_with_adobe_pro.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0830c62e978296c9f01c2/1626374924776/any_sin_can_be_forgiven.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 17340 bytes
SHA-256: ea309ebd6e4bd3b04507f78431fb3ec3623d35943119ed92ef670852f2620dd6
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC4 10060 bytes
SHA-256: 3f6b8f7e0d54c8a9c0d50b314d245506e6b7a5a7d535b7156d4e6aa7e3dc3df8

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