Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d2a102cbae1d1d…

MALICIOUS

PDF

88.8 KB Created: 2021-06-26 22:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ace6f95e9a8ef0bd7978dce26cc7589b SHA-1: 294b9763e236b4180006ae6fb371e0f0059f7d15 SHA-256: e7d2a102cbae1d1dadd6e2bd291568161c0401846306e1ed7a5046fbd43b0ec9
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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 https://oniceh.ru/uplcv?utm_term=camping+in+jacksonville+nc PDF link annotation
    • http://pivotal-technologies.com/userfiles/file/64761953651.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/sejojamosisusosuka.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/qjvak921u46qcr0t3h6o3lsjc5/37929079102.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/gepiz.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c591f53930---wogize.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/26174549327.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/74145745926.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c874d9bbdc---2228953699.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cc62bf77d---10676753942.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/59683500786.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a3915023c3738a28579bef0923f2f19c/41435908169.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/51915956169.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e83e5f6f0---91926153678.pdfIn PDF document text
    • http://araonline.hu/uploads/file/10619575448.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d44dfcdbdf9---rotozukezo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f34e0d10f806b3c0ae931de65169473c/85686308366.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/v0gcfpkktguv8keevhggcjjsq0/tisonokegobut.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/22764926597.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d546d1084---sopozedasevobezukipil.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/fisuzufimoludomujitejubit.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/namiketajapadepogedovevu.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/99124637283.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/liwagon.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_off0000f517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 10836 bytes
SHA-256: 03839ea4feeba8319918c3a678ac91113475d473f6dcb438aa08c6f3b38c5131
font_01_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 17780 bytes
SHA-256: 547dc941831d6274563d4e1d7e9792b511f412aa460fa0dae656c4e8b19fc90e
font_02_sfnt_off00013c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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