Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c9232bf83a6708…

MALICIOUS

PDF

76.5 KB Created: 2021-07-15 16:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33e0485343a7017e661fff73ab1c3dc2 SHA-1: 37783f22af6f852dd5af922528b8b5b04835094b SHA-256: f0c9232bf83a670806d5ca3e035a27c6bef3a908e81abf74b3ed655a79e56276
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is a feedproxy URL that could be used to redirect users to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://feedproxy.google.com/~r/sq/ugae/~3/CHqDoFjlE84/square?utm_term=formula+for+present+perfect+continuous+tense
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1579537273346e2c83f5/1626215801759/gidetutamixuwiti.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ae20f29cd6423db1f176/1625796128591/maya_angelou_alone_poem_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda9f15a30a704d0c131d4/1626188273340/steve_jobs_and_sculley.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee62118feeeb055d9c90b7/1626235409123/47786705441.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edbe483be50f2c5daa8d3e/1626193480723/femopefixikedi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec92df97282d6f46918d76/1626116831341/meaning_of_conscious_in_tagalog.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f03645365a201d3c3c300f/1626355269554/vfr_vs_ifr_conditions.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec84f70d838b6c850d0fef/1626113272067/electronic_devices_floyd.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fb6c563c1506a8b48baf/1625881453031/period_on_graph.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee58eddf3d323292d25640/1626233069447/morrisons_situational_judgement_test_answers.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_off0000cb7a.bin
93164913b1a7a433fa4ced77250c3663e3ab3b9ca209dedff78e961c533db020
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 16080 bytes
font_01_sfnt_off0000f4b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 16792 bytes
font_02_sfnt_off00010ccb.bin
e7905dcb20e3b726e382e813e2f36039b9e3f4ce6b2302b3710ef800962abff1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 10716 bytes