Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54355a7fcf80029…

MALICIOUS

PDF

81.9 KB Created: 2021-06-07 04:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f2b21761dbe25f5b535e0b9688dca4 SHA-1: 3b42b3cb08236ce4805bd1a3c8c13614c1de5629 SHA-256: f54355a7fcf800293e6abc8e59a573f0d91574986aa9cbb97f3cad4898602a89
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to lead the user to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cructi.ru/wb?keyword=how%20to%20change%20tire%20size%20on%20bully%20dog%20gt%20tuner
    • https://static.s123-cdn-static.com/uploads/4374980/normal_60011855a544f.pdf
    • https://cdn-cms.f-static.net/uploads/4450439/normal_603b94570c43f.pdf
    • https://cdn-cms.f-static.net/uploads/4378599/normal_60552644ab0c4.pdf
    • https://cdn-cms.f-static.net/uploads/4424043/normal_6052db22a361a.pdf
    • https://cdn-cms.f-static.net/uploads/4455684/normal_600aaeb908eb9.pdf
    • https://static.s123-cdn-static-d.com/uploads/4491152/normal_60b6fe8eb23cc.pdf
    • https://cdn-cms.f-static.net/uploads/4369189/normal_600cee8320836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d08b8a53-11e3-4c73-a047-27c5aa3a4dc3/grimorium_verum_the_true_grimoire.pdf
    • https://uploads.strikinglycdn.com/files/54e35661-f917-41fb-97ec-b2818d998bbb/legokexavexiwasi.pdf
    • https://uploads.strikinglycdn.com/files/824b2cb6-69c0-4a22-9a7e-cfefb6aed5fa/war_horse_cast_national_theatre.pdf
    • https://uploads.strikinglycdn.com/files/c04a2fd2-bf8c-466c-9d48-5968bf7110c5/adobe_premiere_pro_cc_2019_crack_reddit.pdf
    • https://uploads.strikinglycdn.com/files/f3ed9194-7285-43cc-a0aa-bbe0a775e13b/how_to_change_ink_cartridge_hp_deskjet_3636.pdf
    • https://uploads.strikinglycdn.com/files/161f0d80-9cc0-4a5a-b7ce-b34682fa1dd0/sta_rite_pool_pump_2_hp.pdf
    • https://uploads.strikinglycdn.com/files/8254235c-ab58-4b4a-9305-c546859f10d2/panasonic_cordless_phone_manual_kx-tg7871.pdf
    • https://uploads.strikinglycdn.com/files/e6917ada-ea7f-4123-8ab4-2b3069b58a41/salems_lot_2004_trailer.pdf
    • https://uploads.strikinglycdn.com/files/d60d1f12-a106-42a5-8280-8d955c47ab41/think_and_grow_rich_napoleon_hill_youtube.pdf
    • https://uploads.strikinglycdn.com/files/06ee439a-3cb0-4d2f-b635-5625dd0240bf/30857844540.pdf
    • https://uploads.strikinglycdn.com/files/3261f96b-4e8f-4808-a9aa-2ad48fdd524d/50052402264.pdf
    • https://uploads.strikinglycdn.com/files/53f0bcb6-93ec-4bec-9f7d-cf90d02b1279/5e_wizard_spell_sheet.pdf
    • https://uploads.strikinglycdn.com/files/532b892a-e3cb-4193-ba33-7ed320cd818f/lufamuwelodazilotesokoj.pdf
    • https://uploads.strikinglycdn.com/files/44aa2e94-e4f0-40f1-8d9a-c7770e757d1f/15458575601.pdf
    • https://uploads.strikinglycdn.com/files/287f584b-32b5-4ae5-8c44-5f15136e7946/tifiwobipiworugurap.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010034.bin
9c36e7ab728a483f16ec1e4a6e4d6ed858fd86b026fe7011f7360bcf02cf3b51
pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 5548 bytes
font_01_sfnt_off00011327.bin
488f689728227a2c65f9fc1606eac3501b834b53466be9a14461011a6a5218a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 11404 bytes