Malicious PDF — malware analysis report

Static analysis result for SHA-256 d629b6784764d8a4…

MALICIOUS

PDF

106.9 KB Created: 2021-03-14 21:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 86910b792f62dadf3c7869ab585b7f52 SHA-1: 574593eeb83d03e0f12d75147ca684e69772fa03 SHA-256: d629b6784764d8a45ce5c4e5c042b13717e4a5648edd1492bf97b1839811ed88
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-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.
  • 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://mezovuduw.ru/wix?keyword=madagascar+and+the+indian+ocean+islands+examples+of+animals PDF link annotation
    • http://lnstagramcopyrighthelps.com/74811136163slrre.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/2410990.pdfIn PDF document text
    • https://cdn.sqhk.co/nikazefuju/yia63Iu/24566057278.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/gopezedon.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/diahaih/telegram_link_download_movie.pdfIn PDF document text
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/4663797.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/6145338.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/tibUCmA/does_bucket_list_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/gjaBYii/risadaxexubobu.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/nujamuzazuxubegexojup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_60464ce75d362.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/hp_laserjet_100_color_mfp_m175a_toner_cartridge.pdfIn PDF document text
    • http://teleporttur.ru/pennywise_spider_form_1990bhbht.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462038/normal_5ff637413927f.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/koxedexemefuw-zaxami-getufojidosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417643/normal_60048ce134a8e.pdfIn PDF document text
    • https://cdn.sqhk.co/xovijanovupu/WWpDfhj/a_monster_calls_patrick_ness_epub.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/zakunafu/50913104927.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/4380435036.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/fasorunoxiwome.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_off000161b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B6 5644 bytes
SHA-256: 43a41df327d4c77c58dfa9c05ca9829c7e4a1d0ec6f6189232ddebae325f7d1e
font_01_sfnt_off000174d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174D9 12380 bytes
SHA-256: eb1685b0832fefa6514de23b9e62a377644b5a1486dcabf364662c061c197cfb

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