Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c92f49229248b3…

MALICIOUS

PDF

88.9 KB Created: 2021-07-17 03:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 808f4a9a43bef95197ada5af36ac85a0 SHA-1: 408a02964d2e95e7e97cb34e316d0b2cb6272c41 SHA-256: b3c92f49229248b31b5d8403f2f167178dd8691bc7be09148d3d773b532ff7bd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. Although the document body is heavily obfuscated, the overall context suggests a phishing attempt or a lure to a malicious site. No scripts were extracted, but the PDF structure itself is flagged as suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

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/~3/4Ji06Fp1PxY/square?utm_term=blackmail+meaning+in+arabic PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ede075537dfa200404d10f/1626202230072/jokenugemove.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7ef83f7a034ccb7a29be/1626111736521/muster_the_will.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec81df12c1416d2f1ab00c/1626112479570/girinetepadomafo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2065dd0ff77501fd6a124/1626474077896/scars_on_broadway_torrent.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f116aae7c7822395880142/1626412714352/61079937547.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee8db85f7927514e418084/1626246584423/textbook_of_chemistry_class_12.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee145b6d75c50a5d409f52/1626215515145/35064122237.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5f8177e2cd4113f222ac/1626234753787/swot_action_plan_example.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee5f0c86aa876280bed5cd/1626234636999/zofedefejabadinuwarek.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000cc55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCC55 29004 bytes
SHA-256: 57f4aa6c77c5573f2f194be0058718b007fae951adec155e281b73aeec44b10f
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 10472 bytes
SHA-256: ecd5770bb43634781f3f1bc988a0871685268ef7b72311f08cdf1ef1ffeb0f94
font_02_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 14824 bytes
SHA-256: 2cb1dce48f86380c6c112ee7f2277d6283a323a901f99cf4a5a869a61267c4f7
font_03_sfnt_off00013da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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