Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecabf8d659fc05f3…

MALICIOUS

PDF

77.7 KB Created: 2021-07-17 21:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ca7584ccf6813d2e20043fabb2ee8f4 SHA-1: e24219b6a0fac78ce1ce616aae38effba37c0d66 SHA-256: ecabf8d659fc05f3e349123229394c7424f6c809ac314138cd85beac48d60f59
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to external content. The PDF structure and embedded objects are consistent with phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/~3/5JeRQhMeIYg/square?utm_term=nested+if+else+c%2B%2B
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9ec9934d360eb28ad98a/1626119881925/sirejezamufofixixagunuz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9c86e0914637f38d47dd/1626119302959/restrained_retaining_wall_design_example.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc5cae83f616bcf7fff2e/1626195402738/72980427206.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f238a02be78d52658fbbd2/1626486944137/komijavej.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93752025aa46e30d381c7/1625896786773/xonipikiduruxipivoridibif.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed8b35fc46f1629a06c4e4/1626180405674/97418734580.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec893d72e2584f2463e45c/1626114365624/54466986574.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2d7537e0b4d5f6b14b97b/1626527571976/after_full_movie_streaming.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ede86de11d817478d30e86/1626204269991/xakor.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f27a1c80d83038fa797e6c/1626503708678/the_cook_the_thief_the_wife_the_lover_movie.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a19b7d3b385c94b28d9c/1625792923616/60722343474.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e805ad1c6ee137fa1285bc/1625818541523/easy_stuffed_cabbage.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_off0000ce14.bin
5602390acfbfcd1209ac640af26de6e9679cc392fd2fe2e3e086466f751e50b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 17532 bytes
font_01_sfnt_off0000fc7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 16792 bytes
font_02_sfnt_off00011494.bin
a2a1aa014f724fdbec4b43bb2314ac3def708412b5e27cf26832aad60dd64d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11494 9960 bytes

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