Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2f687886bafbf0…

MALICIOUS

PDF

64.3 KB Created: 2021-02-24 02:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5710f1735dec89bcace20bbb6a6def55 SHA-1: b9e879308026e63ecc1ba181faaa9135466f87dd SHA-256: cb2f687886bafbf0ecd806b285d1659ed4a7087286ea0b9b45e3e46b6e07db3d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ClamAV and an ML classifier. It functions as a link farm, containing numerous external URLs, with a significant number pointing to disposable hosting. The presence of these links suggests an attempt to manipulate search engine results or direct users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/strik?utm_term=bunker+hill+security+cameras+harbor+freight PDF link annotation
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/9261671.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/power_xl_vortex_7-quart_air_fryer_manualvxudh.pdfIn PDF document text
    • https://povufajesozibu.weebly.com/uploads/1/3/0/7/130739002/dupisap.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/400968.pdfIn PDF document text
    • https://pinababinazu.weebly.com/uploads/1/3/2/6/132695354/4a529ad4609717.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/ewUsid5/a_pretty_odd_bunny_download.pdfIn PDF document text
    • https://kusikulovaledif.weebly.com/uploads/1/3/1/6/131606813/lerekove.pdfIn PDF document text
    • http://idealslimitaly.site/monthly_home_budget_excel_templateyuj4g.pdfIn PDF document text
    • http://avto-trokot.xyz/exhale_sabrina_carpenter_piano_sheet_musicj6a3v.pdfIn PDF document text
    • https://cdn.sqhk.co/gefizorabubi/xhiigie/marupo.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/a56e33523.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/6059078.pdfIn PDF document text
    • http://piredvizhnik.com/jorazuxilafawigotenagu0fu.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/9sIBna9/kutimokonikivawir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejelinemadagep.rf.gd/2819395291.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/pojujorikatom.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/58502624056.pdfIn PDF document text
    • http://mofetase.rf.gd/mekanisme_kerja_obat_atropin_sulfat.pdfIn PDF document text
    • http://tinutun.epizy.com/jixutewadoxegasena.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_off0000beed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEED 5652 bytes
SHA-256: 7c7111af73827b428af984fe5fcf87688fb204b0d7cc857bf3ea7afa7f7b1891
font_01_sfnt_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 9932 bytes
SHA-256: 84dac71694aaf98da3f1550e72470f16dddf57100794d9b6e382438f7b841b8b

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