Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d073e0b82c80eb5…

MALICIOUS

PDF

71.5 KB Created: 2021-05-30 02:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60422c487b20961fb2161ec8f48a72e1 SHA-1: ab68e36a2723300f160e3539b60afa9d4482c0a7 SHA-256: 2d073e0b82c80eb5b2f8376d84ed5a432ada508fd6a42e9b35b93be2efb3779e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=how+do+i+study+for+a+life+science+test PDF link annotation
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/g984f22ggbqptuuvhk917f25r8/ximezapomumelobu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608d48d4d95ca---52031809597.pdfPDF link annotation
    • http://aep-tc.com/cache/fck_files/file/motepilijipibeberajuruzab.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/5fja5isubbnqd9a6uo6ib04qa2/sopijimakinerazotelafi.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c58eebcffdb92b5cda166de99e523521/27337983977.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608950a5186d1---67432013172.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ed0780a9b22a14014a357e6a83e6a3f8/melewuwexovugu.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f091d1c327---xutudoputagowofabisepuxa.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d2719bd31---kufazuba.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b17d6d94---jevujubivudukire.pdfIn PDF document text
    • https://activepymes.com/pub/file/sufapepunasofewudopex.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/87323383821.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/40399612809.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/82701561068.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8d9d0e65d8db52bd86b6b8ab7e35abe4/xenapenibe.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/pejekuretubogukubotati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 5168 bytes
SHA-256: d294edf30413e575a4bfe0eb03f5abc6f27f893dbbd5024c2e2573b2dc8e2b49
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10384 bytes
SHA-256: a65b206a0d6b5c933d3c9494c1b4c6b878433b1d33f5591b91efa292cd60364c