Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c2c5df02fbd4f8…

MALICIOUS

PDF

67.2 KB Created: 2021-03-11 05:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 93ecb7bbe04d6d2b89a179b3d5471f35 SHA-1: 49398d42548deb70cf7ba96a09dc1f86fcd77115 SHA-256: 69c2c5df02fbd4f815fa12323cfc63534da21499c3dae5b777ccd0ecadba7df3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload. The presence of multiple links and the 'link farm' heuristic indicate a deliberate effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=skyjack+sj3219+specs PDF link annotation
    • http://getbuiss.online/contract_bid_templateun0g9.pdfIn PDF document text
    • http://akb54.ru/vamoduvoxevepoba3ez8.pdfIn PDF document text
    • http://kefets.xyz/64179260287aylds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fec794a05a03.pdfIn PDF document text
    • http://numberoone.xyz/68460811090vrugh.pdfIn PDF document text
    • http://promooffer.site/wewokifikidaseruag5pi.pdfIn PDF document text
    • http://gatorama.site/algebra_and_trigonometry_with_analytic_geometry_sladerrxiuh.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/senitip.pdfIn PDF document text
    • http://detonicro.website/telcordia_sr_332d59wk.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/rovemuzikutusexepatfm80.pdfIn PDF document text
    • https://zokanebawabor.weebly.com/uploads/1/3/1/4/131438448/74fe30c.pdfIn PDF document text
    • http://wexypay.icu/962114483166r4kv.pdfIn PDF document text
    • http://firstsecu-paypal.com/nte_ecg_semiconductor_technical_guide_and_cross_reference_booke7y1z.pdfIn PDF document text
    • http://app-3null.com/ministry_of_information_and_broadcasting_address_delhi6r0c6.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/relajev.pdfIn PDF document text
    • http://nashremont.site/cyclomaniacs_2_character_guide97eua.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5ff17675d8c04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/pixotud.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/the_darkest_minds_book_age_rating.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_off0000ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA54 5648 bytes
SHA-256: d95d8989468d17dc7e7d52bcbdf2cb58c20ac07f453d8317ffb74e7d22ae00c1
font_01_sfnt_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 10096 bytes
SHA-256: d8cb805abafc855be8a8aa139b419bc3ab20151ec399e2383c3ebd9a7523fb1f

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