Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1817cd373fbe28…

MALICIOUS

PDF

73.1 KB Created: 2021-04-03 22:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a1c32cdd8c5882b80d2dc770a1f42084 SHA-1: ee9ee5c0b7d932811d5a27128550e14cad023228 SHA-256: cc1817cd373fbe2801b5006463e006b15d9896c84732fc194ff1baf15cd5fd59
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://resalured.ru/wix?keyword=super+mario+64+non+stop PDF link annotation
    • http://badge-verification-center.com/how_to_get_math_symbols_on_google_docsgpqhp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_605a120e4a25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_604f9fb9a9cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_604e0436b544b.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/wukidikejdxg38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5fdd45ad1a25c.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/Jhajehf/pupidijanif.pdfIn PDF document text
    • http://lajalura.22web.org/vewapekapalaxoxezar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374698/normal_5ff7e3aa9117a.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/b0vPjec/sanadedawubero.pdfIn PDF document text
    • http://finansi-7.online/14372424564u9f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_6059b9016ffb9.pdfIn PDF document text
    • http://goloszauniver.fun/56062822464qrn6e.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/351009407478y3z0.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/Mqjehjc/.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/geZggje/48348208287.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/cifIQlW/sniper_movies_list_in_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_604f03c589c7d.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/5601f63b-3d9c-4c40-ba63-ad771dae430e/how_to_write_your_essay_for_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a32249-1d05-4b7f-a67b-b1af773a7a90/fasipepixowusasalofanu.pdfIn PDF document text
    • http://birevave.rf.gd/aurangabad_pin_code_list.pdfIn PDF document text
    • http://vepilezora.epizy.com/5121161004.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_off0000decf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 5276 bytes
SHA-256: 2ea2be92c67a26a68b17f94e55ba71e110de5d5fc9597cb9bc5b01b6f2b444e8
font_01_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 11336 bytes
SHA-256: e973181f06679f6754b2b90ca7a7a6e1a7221d267624f8b46e8d9f19af12ba6f

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