Malicious PDF — malware analysis report

Static analysis result for SHA-256 f102877f22b4dbe6…

MALICIOUS

PDF

106.5 KB Created: 2021-06-05 11:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 11d5747df734a9790a7a610f17162287 SHA-1: 8bfb3a8fa8c73e9185f653b91824423cbad56997 SHA-256: f102877f22b4dbe6c1032af6c499fddc3ad042a263f8c49ef22c4b4dfb335316
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://gimoguvi.ru/123?utm_term=drilling+large+hole+in+sheet+metal', suggests a potential SEO manipulation or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/123?utm_term=drilling+large+hole+in+sheet+metal PDF link annotation
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/fupopodaro_vesinuzawajono_tidawukijugo.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/muzenokazuk-gukewajupifi-zuxaro-solezigigixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_6064d04f340e2.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/vedexakozajam-magerulin.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/ea0263099e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60157dbdc9a5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5ff7c92bb838e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomedaj.pbworks.com/f/is_walmart_good_for_america_video_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a53e27a-6c99-429b-9641-82a195736357/how_much_do_crime_scene_investigators_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cd4360-742f-487a-8fcf-3df88d574637/vegelejaxuvovavopolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fe9458-9645-4a6e-af30-e26da2845d07/dmso_natures_healer_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de95537e-804e-4eeb-9351-5b030c4b2c7e/gofivama.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144458949/basketball_scorebook_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec59563-a5d4-4d3d-99e7-09e70d0805e3/66612202697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1ae6d7-0862-4000-a277-f396ca724559/koxakifusabatutudano.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/f/newuwazelumosuvuwilabemi.pdfIn PDF document text
    • http://vazesuna.pbworks.com/f/how_to_pick_up_money_from_western_union_without_tracking_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68997be0-3954-4fac-a5aa-fa07e8f871f5/schlage_keyless_entry_camelot.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_off000166ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166CE 5096 bytes
SHA-256: 060a517f9b6a56efbc24abf6d5896267b9b8bba6108399c687b77bb4e6215a1e
font_01_sfnt_off000177fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177FB 10840 bytes
SHA-256: 4b8f324dead953e6942abdc462528bb5e2c980849b1a6c0326bf3efbb4eff811