Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8da6a90f1c9220c…

MALICIOUS

PDF

80.8 KB Created: 2021-07-12 20:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f570afe4f02bf060eef7c8e00e4f0ae4 SHA-1: a7ed8350b80bd5d1c6ff396eddba6b0057388d0c SHA-256: d8da6a90f1c9220c69cda4d83f3e748b8b954d7d0f0e9a2df20df9b6c6214158
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it is an advance-fee scam lure. The embedded URL points to a suspicious domain, likely part of the scam's infrastructure. No scripts were extracted, and the document body was unreadable, but the combination of scam-related heuristics and the external URL strongly suggests a phishing or fraud attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pistant.ru/square?utm_term=paul+hollywood+and+candice
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7a88dcef4a49b3a9e8e4/1626110600868/90347137364.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7f70dd2ac847ff7e2893/1626111856683/32928036886.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7713dcef4a49b3a99164/1626109715244/stock_offering_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e82cdba3609a707baf72b7/1625828571904/cross_breed_of_wolf_and_dog.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b5308592fe3a588fc3f8/1625797936283/role_of_communication_in_leadership.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d8d288cf71862a8f11c/1626111373680/fukowawurawemugar.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8cc6e2b8982254c49f9e6/1625869422782/question_answer_of_nutrition_in_plants.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e874df9603dd5638fed449/1625847007632/97512044937.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94db0309bd63f3d8764b9/1625902512431/lefumozobes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d967.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 16792 bytes
font_01_sfnt_off0000f179.bin
d9b9967d67ce4368f8ac1545272c18d227940bb9731b7aa78a08e2ac9fb06c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 17036 bytes
font_02_sfnt_off00011df0.bin
3a99c46903f5424f26f599079ff638778733921b9fef92c80e00dff3d5a0d471
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF0 10400 bytes