Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22f35c4d2d5d33e…

MALICIOUS

PDF

77.3 KB Created: 2021-04-20 08:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6396c95819e5453ed188aa70aa0a4510 SHA-1: 12054e17eabca54e6fe8e3f7d1b5de7742eeb124 SHA-256: e22f35c4d2d5d33e947066962e35e39624c9220f6efe0f7d1affaf1e50e127fb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=how+many+miles+can+a+gmc+envoy+last PDF link annotation
    • http://alsamcctv.com/28627395346yy8z0.pdfIn PDF document text
    • http://fherixq.com/kumepavuwojejerisebweyz.pdfIn PDF document text
    • http://xxlmature.site/37452289782qv3ur.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/icq7wOO/65816535627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_6039ad67177aa.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/nkicnAI/bulleit_bourbon_10_year_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/dgg5jjz/64528264924.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/Egjjhto/89144068169.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/ijBAlif/best_video_length_for_social_media.pdfIn PDF document text
    • https://cdn.sqhk.co/tuponapalab/pWVLjg4/49898850754.pdfIn PDF document text
    • http://buloshnaya.site/bambi_cartoon_full_movie_free8d72q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fd2d193a2ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6047404443591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_6015d86f6f289.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_fd2ac3b92725465db45884fe6d915c7f.pdf?index=trueIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_ebdfebf1eb634d84aac7672ee1a60d34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b61caea-107c-4883-a9b9-8d3772c8c0dc/42372582338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62b0c1c-fabc-4e19-9fb2-81eccc243a40/2001_honda_shadow_vt1100c_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c89517-b823-45a5-9593-35d36344db17/irobot_900_series_roomba_960_reviews.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_e7f5c63ed0f14d438319413e81e2b242.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_16051406f14e493d8d5c835377c397db.pdf?index=trueIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_6eef2cea2b2c4afd84909f76b796017a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c0fdd9-7093-44d8-88f5-e66879d9346e/what_does_positive_punishment_mean_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56144116-34e6-42c0-a084-74eb203bdb9e/padukoku.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_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5236 bytes
SHA-256: b8c11125610e1fff0d0cb693288b793abd013c3eac4aac87e42c929faf0af942
font_01_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 10340 bytes
SHA-256: 2fe7df87f7aa648e92980c177b2d38ccfdc35487287d0432d33813fde4e6a059