Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1f977f2e2ec34f…

MALICIOUS

PDF

63.8 KB Created: 2021-02-27 16:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 48fc20472cb4b7a5e75de5ce30eab122 SHA-1: a24aa4b896c05a15aa3c50efdb205450de70f6ca SHA-256: 2f1f977f2e2ec34f27ef2ae603943a9111624deb8ebb43e01193fe1bfe8a818c
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/123?utm_term=commanding+my+morning+prayer+cindy+trimm PDF link annotation
    • http://okrasote.info/67604049851gw1j5.pdfIn PDF document text
    • http://idealicaufficiale.website/40185392377jguy6.pdfIn PDF document text
    • http://gta-msk.ru/uk_board_games_expo_20202gpou.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/fqhjigc/59808875952.pdfIn PDF document text
    • http://getyourcredit.info/what_were_the_three_main_parts_of_the_treaty_of_guadalupe_hidalgovwf59.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/diggihc/weed_leaves_twisting.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/87324035251.pdfIn PDF document text
    • https://cdn.sqhk.co/panazomuv/ejaqqje/ent_doctors_in_las_vegas_nv.pdfIn PDF document text
    • http://sethel.xyz/14263124077g94c3.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/ihghSIh/walmart_black_friday_gaming_laptops.pdfIn PDF document text
    • http://spain50off.info/reperupegemitofovaxateww3zrv.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_off0000be52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 5188 bytes
SHA-256: 9f4269157efb93202163f7068b877d30b56e0b18b8b19c12d991d91b567162ae
font_01_sfnt_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 10208 bytes
SHA-256: 89097918c4ba1e0d637fc76a35c53a3dc73bd7256e4a0fc23312452e3b41dad4

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