Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c289ad388c71a2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 05:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f709baef6bf476b05b1f4cd8576cccb8 SHA-1: e64c3101ee54eddffcbdead425ee98f76469161d SHA-256: 01c289ad388c71a2a3a68d4f391228800b09fb421b2e1fe645e24ccbfbd0276e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains multiple heuristics indicating malicious intent, including a link farm pointing to compromised CMS uploads and a lure to enable macros or editing. The presence of a 'password-protected archive handoff' lure suggests the document is designed to trick the user into interacting with a subsequent stage of the attack. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://alanurturizm.com/rsm/files/kadinabikuzez.pdf In PDF document text
    • http://parentini.it/userfiles/files/3333319826.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac7e61df652---dusemujufovokabiwejiledop.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/16807020839.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/8070196634.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afe85c15650---xemobewifix.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/86361754527.pdfIn PDF document text
    • https://12waktu.com/contents//files/78908344763.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/16534404278.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///xupuzubozo.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/lakapotudub.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/kakexevunuj.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/68932698721.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0e280c9d---41412224141.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/kolafutupokarefewaruzop.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/25533989752.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/wutoxabivusibejixofe.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/pudukijetetu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3151d8e8a3cf20ed9d2ebcea30c6226b/68946285260.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/77088598204.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/81499815037.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/70242060040.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fe3919f58---gegav.pdfIn PDF document text
    • https://hoavily.com/uploads/files/pogudojulizovuboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+edit+secured+pdf+without+passwordPDF link annotation
    • 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_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 10744 bytes
SHA-256: b8a5b03216d20a30b1912e2006b7307c68f61467b78c308d6c83ef30f9e8ee63
font_01_sfnt_off0000f272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF272 17424 bytes
SHA-256: e01db5ee3a517cb42a0ad274f0ebc56a1aecfe48bd046938ad9c7742407b3ae5
font_02_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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