Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6314f29f3960d6…

MALICIOUS

PDF

70.2 KB Created: 2020-12-15 08:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cc6c13995cdfd069e2c47a54d600c6eb SHA-1: 1f090bd9a7b000a5fc793eed1fdcdb9e4ad2939d SHA-256: 5a6314f29f3960d685fa3e8c70bc2b16120cde0f58bd9639e28c5752ec416290
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI pointing to 'trafffe.ru'. This URL, combined with the 'SE_DOWNLOAD_BUTTON' heuristic, suggests a phishing attempt to trick the user into downloading a malicious file. The document body contains garbled text, but the presence of 'flexispy download apk' and the URL strongly indicate a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/123?utm_term=flexispy+download+apk PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1367bc819f1cf4a078b9/1606292329481/anti_bullying_quotes_pinterest.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/modern_british_and_american_english_pronunciation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c9feb2e29c7ba98face7/t/5fc7fde4ab5e06213908d94c/1606942181015/jiffy_lube_portland_coupon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc165e488c99b6d37aa9f7e/t/5fc6ab951972c46e3c8a934e/1606855573948/33410077987.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/cell_phone_hologram_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54cfdea4a794d566240f0/t/5fd6634396ed101a3e408559/1607885638700/nesuger.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50c986b97992eb5766a10/t/5fc65893145a8629dc8a1292/1606834324232/28058184786.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c57e8787e879896b5618/t/5fc111bf3c02f22b9d330c00/1606488516556/wii_motion_plus_amazon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf13cc7afe470b5554f36/1606218044946/58537412754.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdffac173fb5383b684f3c/1606287277259/36706718348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c60845-2665-4584-ac26-cb55a151e5dc/calories_in_chicken_wings_with_bone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ab6bd64a3343a5fa0e5a/t/5fd1b047ac13f65f66120a9f/1607577671880/18123521474.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d785085bf90c0efcc6ad/t/5fc3e0a008845d092400cb06/1606672545573/banivixikoj.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/49092042687.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_off0000d49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 5136 bytes
SHA-256: dfa2054465dc4510e5bda67a3b960a99423ccc8cb2bea094dc6987aeff1bb173
font_01_sfnt_off0000e64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64F 10940 bytes
SHA-256: 3d42b07139ab490183a44d63310ece714f93f207a5b93682aa815604bcf4e74b

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