Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4219205e50adb0…

MALICIOUS

PDF

116.9 KB Created: 2021-05-10 17:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86df215d42915638c2aa14e66c021e4a SHA-1: d10e92c27a3b3818d8b4b9130d24865d82616605 SHA-256: cc4219205e50adb0543c5235c8829b8746820391fdb9af90cdd36baf9734533b
124 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 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Mack e7 427 injector torque specs', suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the phishing lure indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/strik?utm_term=mack+e7+427+injector+torque+specs
    • https://cdn.sqhk.co/zoluwumenad/gjihGif/balenciaga_sneakers_mens_size_10.pdf
    • https://cdn.sqhk.co/guranotup/fMBB03s/russian_car_stunts_mega_ramp_stunt_car_games.pdf
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/xasanile_furev_watimerekitaj.pdf
    • https://cdn.sqhk.co/woselukafo/ighge57/rush_trd_sportivo_2020_hitam.pdf
    • http://kujunat.medianewsonline.com/fimaxukisu.pdf
    • https://cdn-cms.f-static.net/uploads/4486748/normal_60524edc13c40.pdf
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/lefejaveterite_pujilebopetatof_betoki.pdf
    • http://palopej.sportsontheweb.net/67621133247.pdf
    • https://cdn.sqhk.co/minamojazi/jahfgdd/top_scorer_serie_a_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4401691/normal_600a091a187cd.pdf
    • https://cdn.sqhk.co/tevotapomow/eheYJgf/66549855585.pdf
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/afbc29e683.pdf
    • https://cdn-cms.f-static.net/uploads/4455196/normal_604605b4b6478.pdf
    • https://cdn-cms.f-static.net/uploads/4403818/normal_600bced61fbe7.pdf
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/2663b6ccc7.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_6048307e4ee61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zapuwoz.epizy.com/hindu_calendar_2019.pdf
    • https://uploads.strikinglycdn.com/files/4f6b6e04-7102-440b-826a-a73f61702365/zubinajiwoja.pdf
    • http://fazafowunop.epizy.com/sobajodipedaf.pdf
    • http://titarejidawe.epizy.com/wellthy_therapeutics_reviews.pdf
    • https://uploads.strikinglycdn.com/files/ea2e1796-b259-4dd2-974b-ab8123d8d33c/ligowuragilozu.pdf
    • http://dezejife.epizy.com/21305310134.pdf
    • https://uploads.strikinglycdn.com/files/1ae6c9fc-3efb-4418-92df-cb1a43ab406d/26672835553.pdf
    • https://uploads.strikinglycdn.com/files/b1bae13a-7bf0-4c16-a35c-28989bc68df6/stanley_fatmax_spotlight_problems.pdf
    • http://zikukoji.epizy.com/bilejonukitazotuwinuzete.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_off0001869c.bin
aa87a20df5732494e833d5c93ebf2aabc90bbcd195422d529191f9d00d415d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1869C 5464 bytes
font_01_sfnt_off00019971.bin
d1179666599bf2196aa34a1563f59e80ccc13810c2bad10a184358e523813f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19971 13056 bytes

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