Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad85a48ab07bd69…

MALICIOUS

PDF

75.8 KB Created: 2021-05-11 21:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 72da9e2492798392d37b8721d04ff49a SHA-1: d8567453228851475b5fee722b8ae674a7063440 SHA-256: fad85a48ab07bd69ba425ef86b6150425148ce9c29ac1ca8aed24da9248fb648
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for SEO manipulation or to host malicious content. The presence of embedded URLs suggests the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/strik?utm_term=mercedes+9g+gearbox+oil+change PDF link annotation
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/e35e7a505c78ab3.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/eia3qSj/repufedewoborivaxubar.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/42809854654.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/fadupuwumapakos.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/gelokujenowadax-gixuber.pdfIn PDF document text
    • https://cdn.sqhk.co/nanalatati/gMyij1N/90803331002.pdfIn PDF document text
    • http://canonsburglake.com/types_of_gears_and_their_usesbqqs2.pdfIn PDF document text
    • http://logvoz.ru/list_of_core_values_printablenq8as.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/98677781983.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ja9jf29/6741026501.pdfIn PDF document text
    • https://cdn.sqhk.co/reteduze/bCegiEc/pupps_rash_after_giving_birth.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/23010318927.pdfIn PDF document text
    • http://digtalcaliper09.xyz/nifuv9ioqt.pdfIn PDF document text
    • http://lotsmen.com/chinese_characters_fortnite_nameen5kw.pdfIn PDF document text
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/widakuda.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/85c5be6e-cea9-4498-96a2-ebb2178ab8b1/74952296490.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/124946261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70126a7-c92c-49b6-9e75-dd996a95fc07/xojiwaba.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/weight_watchers_digital_food_scale_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebf23b1-a5e8-4992-9481-5d3bf345a830/83827775381.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_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 5568 bytes
SHA-256: f0942ce3715f514779ef0a4f9a2f8dcd87e506a0b295d901401b7a248551eb28
font_01_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 11240 bytes
SHA-256: a78e678fc22c9900599e9b3f5ffa9589654f308e0daa630824e4d38ecf54739d

Open this report in the interactive analyzer, or submit your own file for analysis.