Malicious PDF — malware analysis report

Static analysis result for SHA-256 6750a206b1243600…

MALICIOUS

PDF

69.7 KB Created: 2021-05-21 13:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ad11c68439b19697c1ef8fb6e41a488f SHA-1: e6f0f9ea3b0fe267f1a411a23bdbf9163323371b SHA-256: 6750a206b1243600bd3cd72dced2afc11c1c3f65a9d9c07c04fa90c480e651de
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL is the primary indicator of compromise, likely leading to a phishing page or a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=histolog%25C3%25ADa+y+embriolog%25C3%25ADa+bucodental+g%25C3%25B3mez+de+ferraris+pdf+gratis In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5fdd1da574892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5ffe9d2f55e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_6056651bf0bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_601514ed51d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6011e447c5b5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_6049880210f61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367960/normal_5fc61fe25baca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_601a9d0a2eb38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_6050758ed1d69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b7b568-d5bc-4474-a0e0-0e61055604fc/litimomezedasupufe.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/mizuwud.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/badrinath_temple_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/91577326950.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_to_share_a_personal_facebook_post_to_a_business_page.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/15960263650.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/bluetooth_software_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/xeloduzedarutajus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6811d17d-294e-48c1-a174-b5a845ceb655/does_walmart_delivery_accept_ebt_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/47444490173.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/element_compound_mixture_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/21525444476.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/wuzenirozedajurazake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db23e173-145d-4dec-bac0-bc37cbba5817/lanepaza.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_off0000cbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE8 5916 bytes
SHA-256: 446c39fa94d7b1f17bb448c00a12f52e8f9b22af782359a97eed70eab8590817
font_01_sfnt_off0000dfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 11776 bytes
SHA-256: f0f7434d6e5f4440a7ee71b1babf9a44a04f89d45825a2e77dd965b83114adf0

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