Malicious PDF — malware analysis report

Static analysis result for SHA-256 649af2af006aeca5…

MALICIOUS

PDF

76.7 KB Created: 2021-07-20 09:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51ca3c8541310de3148fa6f436357beb SHA-1: 5d8394bcf20f9b80c65094a883401c98b5614132 SHA-256: 649af2af006aeca5a379da0411dcfe77317069e675f83ab1adcc13b99facb6fd
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 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 PDF structure and embedded URLs suggest it's designed to exploit users, likely through a phishing or social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/EjZ5HCEZs_A/square?utm_term=acellus+environmental+science+answers
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f41b2704a1d97017a2d7b8/1626610471560/why_does_mosquitoes_bite_you.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f32603860d895b482548fd/1626547715386/temasexiw.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1c45cfe42825f2f931cf3/1626457180711/18771452866.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee989ffb3cc800db5a429a/1626249375989/pinocchio_story_for_kids.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7a06760c9e2bcf421687/1626110470520/how_to_remove_hand_tool_in.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec84ca8300fd66e1966587/1626113226272/wedding_invitation_background_video_effects_hd_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc92010369373fd81b251/1626196256568/41833164629.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e940c4cc7c08645927d35c/1625899204493/nurekepog.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6652b0be3e11db0aa64f6/1626760491991/how_many_credits_for_graduation.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_off0000cda8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA8 16792 bytes
font_01_sfnt_off0000e5bf.bin
4e1549f15db625cbb6988debf98a6ce6ae73c35ec9d8dba78d0ea15e0a9bfccc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 10624 bytes
font_02_sfnt_off0000fe2a.bin
7c11f56ee8a09e43a922eb97d2f9cf855ca8a69607a1274fa2cdf13185e9f3a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 15772 bytes