Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbe4174808ee57a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-16 16:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75fcfca019dc639072c3c7f1dcc7817e SHA-1: 9ef5ab03903fb591c83585ec18ea04387617b6ec SHA-256: 8bbe4174808ee57aa1eae2e273b097a125841462d91a473f95da2659c1c07de2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. An external URI, https://huntic.ru/square?utm_term=happy+tuesday+images, was found embedded within the PDF. While no scripts were extracted, the presence of the malicious URL and the detection signatures suggest an attempt to trick the user into visiting a potentially harmful site, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://huntic.ru/square?utm_term=happy+tuesday+images
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9164ef4fe78435a3a40e9/1625888334392/install_procreate_on_android.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee2c52aa539923b58526ca/1626221650416/different_types_of_millipedes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f12fc9ff43f80544528816/1626419145949/vuxobipemal.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed8f5fdacdbe35d62bb9dd/1626181471109/empires_and_puzzles_alchemy_lab_guide.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e932d25fa2eb14b90c6698/1625895634645/vowixoroguxikomip.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd851d6ef6771c1db4cd1/1626200145534/52248506681.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7cb5ad93aeb546a13b64f/1625803610641/how_to_get_zapdos_in_pokemon_lets_go.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f05b61d8e413227d1f8880/1626364769543/watch_free_reality_tv_shows_online.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8a13e171439398e0b2ede/1625858366419/my_best_friend_is_mad_at_me_because_i_have_a_boyfriend.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_off0000f0ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 16792 bytes
font_01_sfnt_off000108e0.bin
e4a5bbff56a6a3fe5fbfa3ea1300fa371e2cb07ff7440080c1171b30450ae024
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 16892 bytes
font_02_sfnt_off00013474.bin
3e7957b5dbe838693da40965df479e8f818184c9658aae6f3f610a5a7c7d3571
pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 10572 bytes