Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb844333b53f871…

MALICIOUS

PDF

89.9 KB Created: 2021-06-27 02:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3109c7b8b912a2dfcf154d270c006168 SHA-1: 238ad709bbbe3b283b77dc98fd4b7289524104dd SHA-256: bfb844333b53f871f41d3e701f26a2cf7dc94d115ddb6b93e974aa0eaff785d6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as containing an advance-fee scam lure, presenting language related to lotteries, prizes, and parcel delivery. It also contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or scam distribution mechanism. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://nousgarage.com/userfiles/file/firepage.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/q0pags5937668fph02ubs0l7h7/digaxuwitawuwotemof.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/271bde155a42661e7e8975b8b56f0ff2/2197848381.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/dgdvot2ik1iv8m0gva5b3t8g20/zitidumux.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ohjfon6keb2e7e0jok3jjrpq8l/29058048337.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/0807b595c0eef515d7b54e39efc13879/sitizekimaxixosijemop.pdf
    • http://aps-mes.com/files/file/foposatipezetujesane.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c739a62d6---bolaxivomo.pdf
    • http://ural-resyrs.ru/data/file/navalowi.pdf
    • https://stbenedikt.ch/userfiles/files/kipuwova.pdf
    • https://bandotrading.com/uploads/file/25308918180.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c114556148---49249845794.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc87ef442---16201771584.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bdd689168---61937439266.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/17bj1krd5iq3iodpg8198eua71/33612971010.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/bbe2a48ab5497638146c931cf4060c2a/nokupunanezinazobipowe.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8uhasg6tut7e0heu7ecl4333n5/15686906333.pdf
    • http://engineersclasses4competition.com/files/others/varivug.pdf
    • https://bd-sokolovska.eu/userfiles/file/90783492928.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/411db0547e6182462d8f6d57c9419129/43167903433.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c4dfd0d38170d1c282cb111c5d8d1ea2/nowesogor.pdf
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/fivoxidizuzad.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/df79d84a92d1286266ff563f34966f0f/93368315983.pdf
    • http://korean-school.hu/hangul/userfiles/file/1682978691.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vgqs84jq5ncbnhgjjjvgddmqi1/rodamawefazirobaj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=commercial+contract+drafting
    • 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_off0000ffe2.bin
92570462c6348a47f6e0514df8f6b5c96e401da4af91be23c37a09d09ce90650
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 10684 bytes
font_01_sfnt_off0001181a.bin
9e62e7b45bae05764b3133366440d1b8629c2caee649bcfd6193d3bac643a260
pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 16240 bytes
font_02_sfnt_off000141ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141EE 16792 bytes