Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1e56e1873ffe8b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-13 23:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48138612847c740a89adc474200d0039 SHA-1: f3e7db81670fcdb2e66b2fe553ef581224c102a2 SHA-256: 6c1e56e1873ffe8b8389d2dc3694a7db851ed9b5554ddeb345608d153cd6444b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://dugedepap.ru/strik?utm_term=uppababy+vista+stroller+attachment', suggesting a lure related to a product attachment. The presence of ClamAV detection and ML classification further supports its malicious nature. No scripts were extracted, but the overall structure points to a phishing or spam campaign.

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 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.
  • 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://dugedepap.ru/strik?utm_term=uppababy+vista+stroller+attachment PDF link annotation
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/xabetewaforo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_602ebacd2f865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_600712ae54c94.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/22478237070.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/fogum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484107/normal_600eaea05dc93.pdfIn PDF document text
    • https://vezikiga.weebly.com/uploads/1/3/0/7/130739663/6055009.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/mujevubutukoxu/year_3_maths_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/spider_v_30_mkii_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/33844967765.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/kitchen_sink_material_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ab1a62-3843-48ee-8f6e-74ecd9fccc24/artistic_anatomy_paul_richer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22acb81-ccd4-4c2b-b500-c9c1bf2f765d/what_exercises_will_help_plantar_fasciitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e87259-9e82-40a1-a776-ad914dc1b784/brighthouse_remote_control_ur5u-8780l-bht.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915045af-8ace-4ff1-930b-1139698b57ba/a_classical_introduction_to_cryptography_exercise_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59e8cce-360a-472f-b35a-2cb1f1102728/beowulf_1999_full_movie_online_subtitrat_in_romana.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/call_waiting_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/laserox.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/telugu_latest_thriller_movies.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_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 5464 bytes
SHA-256: 671178c64e4f2afddb383a730765da8d4ab27bd01515b74160644607b3bb4727
font_01_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 10408 bytes
SHA-256: 74a4bafdca01516022b745e43bb79efd7ba9d2bfc2b44dbea6536112e8b64f8d

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