Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6df211854df787e…

MALICIOUS

PDF

70.9 KB Created: 2021-03-17 20:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8ec3de921b50be12ca9721e519ee1566 SHA-1: 297ba689a4b346a789cf6b711b06bae8ca6a99b5 SHA-256: a6df211854df787ed2666f7db5216672f14c2b091c5f31676b4e296d6223881e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=mapamundi+politico+pdf PDF link annotation
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/ea75a8d9.pdfIn PDF document text
    • http://pakavoposot.22web.org/anderson_paak_malibu_free.pdfIn PDF document text
    • http://bodulotol.22web.org/dipexuzugil.pdfIn PDF document text
    • http://meetsoda.pro/49143814046xbi2m.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/64aad407cbb378.pdfIn PDF document text
    • http://idealicait.website/funetimfmklv.pdfIn PDF document text
    • http://216tilford.com/wosikexesuleraregufabu4nex0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bfff7c-c8c7-42c6-8e16-384494700dc7/indian_vegan_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/easy_keto_dessert_recipes_pinterest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f209fc58-1780-4400-8dcb-05210dbd29f4/jukamazokeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9d6e4f-39dd-4d31-8088-892c76989f5e/chick_fil_a_online_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428c30ad-f3a7-4411-9f1c-ea2c4cebc51d/xejiminetulazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fecc40-f772-4cb2-9560-0cf5f9a2d538/3190360251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f747200-ceed-42dc-bfac-b8f9795767b0/58323364933.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/47044119924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a15dd5-1105-4125-b7a7-0e5babae6da6/86577498724.pdfIn PDF document text
    • http://likasiz.epizy.com/jorud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cdf1da-c15d-4a15-bdb4-d2545ec996de/change_management_strategy_models.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df53c16b-d59b-4483-ba82-860b4c037323/86723037961.pdfIn PDF document text
    • http://leribilif.rf.gd/foxuvovizofibevawanenos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cd8716-01ca-4316-af49-db43d8bc3994/74901091930.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 5032 bytes
SHA-256: d15856738c8878944882cea0bbc120d2075d90b0d0f5a6348cbd7f84117273a4
font_01_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 11444 bytes
SHA-256: 3efec1a156dddc2d77fcd6a26dd63df1424ef5c203ce29dfa9df7b223d19fa5e