Malicious PDF — malware analysis report

Static analysis result for SHA-256 7000ac7429cfe45d…

MALICIOUS

PDF

111.0 KB Created: 2021-06-09 08:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b00c973f27a64e4bd47114c1e4918065 SHA-1: ac94f7493807bc595632457ea7132f1170d5b449 SHA-256: 7000ac7429cfe45dd2ac5c89f75c508eeed20b3067c75d0870c19df46e3b2ea5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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 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://inwebjor.ru/pbw?utm_term=dil+hai+tumhaara+ke+song PDF link annotation
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/lubow.pdfIn PDF document text
    • https://gibunuvupu.weebly.com/uploads/1/3/4/7/134746488/nunekozopu-larixisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ffe4ab46acf0.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/46ae15cf7.pdfIn PDF document text
    • https://sajorezofadem.weebly.com/uploads/1/3/3/9/133999754/folakazoreg.pdfIn PDF document text
    • https://datodorigagage.weebly.com/uploads/1/3/4/6/134697486/c855ffd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5feb73f3b05f1.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/8048672.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/1774155e-9ca1-4526-b010-1aec3f45e1a1/21862063668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc473867-1cfd-46ba-b097-0338a8e52d72/tebijomajasomazibosovot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09878be4-b913-409b-b99a-4ec0db39edb0/74003706162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bed20b-617e-43ef-a1ee-6ace36b91aa7/c_primer_5th_exercise_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba83b760-8f65-4a35-8a9b-8492c8ef67c3/rumiwup.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/w/file/fetch/144797106/44501609083.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144551811/43280697093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f01db3-d6e3-406b-bd7a-ab1aa5cb140a/radical_mycology_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc671a0-861b-45ee-a2dd-195dc5a44e11/70036828671.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/f/in_cold_blood_yellow_bird_page_number.pdfIn PDF document text
    • http://razevolo.pbworks.com/f/rujor.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_off00017621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17621 5164 bytes
SHA-256: 8b315afe8c3bf99604653b75e99fc1442778d3370dac0a938eca02da8e94286b
font_01_sfnt_off00018785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18785 11572 bytes
SHA-256: 5debf9c26f866cd92d33c490a52f52559003c93534ad0558b565967d2989046d

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