Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc49c656c2baaaa7…

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 20:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cc325a992c54f1bb347da88b4615f7f SHA-1: e0e3f2a2e8c218b48f30a79eb56a8210b29b3159 SHA-256: dc49c656c2baaaa77094f886ad4fa5215eb9955108b59d9a53641895f50e930c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to lure the user to external resources, likely for further exploitation or credential harvesting. No scripts were extracted, but the overall structure and detection indicate a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=wrap+text+open+office
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec71a1c217102653d448f1/1626108321483/mawupigaxezuvuvimo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e1d98915684aa5399b33/1625874905151/74729904636.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9448ae370ac63228a0bc2/1625900171076/confused_meaning_in_bengali.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7961b6dedd3ae167cc37/1626110305988/download_call_of_duty_mobile_obb_file.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec76fbad1bf7105cca91ac/1626109691369/supitemutono.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8736162e6514f690602fb/1625846625296/tuesdays_with_morrie_questions.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e955ba58c6623f0383f9e2/1625904570117/business_logistics_management_5th_edition_free_download.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_off0000cce1.bin
e170e5b2342ad38919b08656428c21c9002584cc9105db808ac00ab2e4977a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE1 16800 bytes
font_01_sfnt_off0000f8be.bin
576e2473d7e7d935e1a2a94a6aeb4553687c38f567d62aa71a066e05bc20dfeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 10356 bytes
font_02_sfnt_off0001104b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1104B 16792 bytes

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