Malicious PDF — malware analysis report

Static analysis result for SHA-256 d425bca0bea5e228…

MALICIOUS

PDF

71.0 KB Created: 2020-12-06 09:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 79bd31439b1521980540e7c2d178fa1b SHA-1: 3049820daefbf4cdc3f4d83476435a6c4020321d SHA-256: d425bca0bea5e228ca4bc59de9f26e77f0a937b0255c30349d1fb88aeb9471a2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to contain keywords related to 'dog food', suggesting a lure to disguise the malicious intent of directing the user to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/wb?keyword=answers%20raw%20diet%20dog%20food PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc67c375f04d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9a83daf02d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f8af82f0e0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f82da5238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5fc8eaef11629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5fc3ceb524cf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfb23f81c9a2a0c6830b9/1606286115974/42-45_inches_in_feet.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/66360187844.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc15795e6d49a06bbc45e6e/1606506389439/barrons_ap_environmental_science_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916fc244-c045-4602-abac-1c3834549d0c/xezutotebalog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fc215006457125654840745/1606554881178/93540509608.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cffba4d75e5252f0b0fb/t/5fcc175d1e1a4d7de118f381/1607210846265/natural_nails_spa_boone_nc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd080e8bc8713fe6ff31c4/1606223886599/topologias_de_red_bus.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 5124 bytes
SHA-256: 5d08e06c3b781337fda24607c2f8f89f49ba4561ba9b03b66fadc0a756c3a42b
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 10436 bytes
SHA-256: 6974d96cfcf0acaeafbd001354e3098a9043a61cba1b4cc8775db083685bc665

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