Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5c4ad6811ef3ff…

MALICIOUS

PDF

108.8 KB Created: 2021-07-13 11:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c80dda4583c1b35820791446d0420c89 SHA-1: a051afc53b1837b3c0d4b2fa4ffde1506007ba7d SHA-256: 0c5c4ad6811ef3ffe60535ebbcb3b0de8e6a7ea011672d6edf5dc1331f8d03be
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 phishing or trojan threat. It contains embedded URLs that likely lead to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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/UZrB20b2Dcg/square?utm_term=the+real+real+stock+symbol
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecafc174517d3de2171ba1/1626124225752/bitaloket.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e859382b6fc73ef356d187/1625839928596/xokepogupiruga.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2c63493b4338208ab03d/1626156131923/73577403880.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec82c0ef188817f7e14d31/1626112704755/variance_meaning_in_telugu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94b872210ba6bce136ec5/1625901959798/volume_of_pyramid_formula_with_square_base.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91ad5854c1d3b3486c0b4/1625889493943/32258976276.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90740b132fa36207254e1/1625884480340/remase.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca7fe4f558d0bf39f6582/1626122239190/13414140191.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e85a0a3d918c51ce63c29a/1625840138853/convert_publisher_file_to_online_free.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7888538ed220952a87867/1625786501096/sidom.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_off0001499b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1499B 16792 bytes
font_01_sfnt_off000161ad.bin
0f3c4e0a0e1851fb4b56647a8a2ec6c018244957323a44e864843ea56651da1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x161AD 16752 bytes
font_02_sfnt_off00018d66.bin
55344f013ad2778aa9cb7db756b9d0defc85c9b0d747dbc3332b72b862b94dc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x18D66 10608 bytes