Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d943ecdd8e2b274…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 05:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: adf37bd9f71b954aa2de89ab08749236 SHA-1: 5d022ee8b7660ec771b9d1b4125397237c7cb9a6 SHA-256: 3d943ecdd8e2b27452a068af7794108c8946a59014fb45760776166798185c67
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and is flagged as a link farm for cracked software, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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.
  • 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://garglob.ru/uplcv?utm_term=office+suite+cracked+apk PDF link annotation
    • http://rsport.eu/yonexshop/static/file/30575284195.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/lekovatab.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/sasaravobegozuril.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/redig.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/wuvovaxadejagovamilenotem.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/jejuvonolofifopizelovosuz.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/52447556760.pdfIn PDF document text
    • http://nincity.de/inline/file/viduba.pdfIn PDF document text
    • http://one9five.com/userfiles/files/42528886450.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/96186904380.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/44539808722.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/6502316369.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/27648376711.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/35825770857.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/jopidak.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/30792663366.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/dezuxuzerirevisukisuri.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/mosireg.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/11361627071.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/lavozopet.pdfIn PDF document text
    • http://agilesolutions.in/uploads/disemu.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/24559094565.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/zabasa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 10560 bytes
SHA-256: fe2a7e2b4e406de48c345df0abcffbaf4cffe28081ed4411d05b18d72963ea0d
font_02_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 17496 bytes
SHA-256: f9c040bca24aaa72117dc1e0385379f807129c0ff67693104aba15b1a758a94d

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