Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5191d8a31ee4090…

MALICIOUS

PDF

78.9 KB Created: 2021-04-03 08:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09056665392a885c0fd951c383cfb343 SHA-1: b890bd60e3ee68f00cbf59e085688e4c394fc85a SHA-256: a5191d8a31ee4090300171685708c50f690ffdfa4f98be05fb28c9da43d39e27
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://dugedepap.ru/strik?utm_term=how+to+change+battery+in+kidde+smoke+detector+i9010 PDF link annotation
    • https://cdn.sqhk.co/zupololano/fgc01ib/63751695684.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/1799053622.pdfIn PDF document text
    • https://cdn.sqhk.co/vimitewimuwi/iGnichj/jisomo.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/hcPQjhb/selezemitefotezan.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/how_to_hard_reset_iphone_4_without_itunes_or_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/erhiSjg/mad_gunz_battle_royale_fps_online.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/sean_paul_songs_audio.pdfIn PDF document text
    • http://gigusopubevese.22web.org/janakebebuvobofesejabom.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/free_cursive_alphabet_practice_sheets.pdfIn PDF document text
    • http://jokegave.mywebcommunity.org/32138761619.pdfIn PDF document text
    • http://gunonoxuketevel.22web.org/32547307849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapujeg.epizy.com/tuwomimudiwasosaxatep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14dfd6c1-772b-48a1-b4ee-3efe03ffcf44/whirlpool_cabrio_washer_and_dryer_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcc6505-13eb-402e-bee0-de0f5e415b32/23947033926.pdfIn PDF document text
    • http://vawirir.atwebpages.com/review_oral_b_vitality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0abca1-e850-4f03-8a5d-ba6bee7091c7/traducir_de_ingles_a_espaol_online_gratis.pdfIn PDF document text
    • http://neloralo.myartsonline.com/oh_hell_card_game_rules.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/6105489874.pdfIn PDF document text
    • http://zotawof.rf.gd/79021948019.pdfIn PDF document text
    • http://vagakidid.epizy.com/what_is_taco_bell_healthiest_meal.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/68785526770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10b2615-7209-4425-b23a-c59b55966c85/rewajematu.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_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 6028 bytes
SHA-256: 7d0f987fd3e6ca91f15b1f1b6f9d1a3b5a5d0ccd57ed69c89cbb01d8feff1c0f
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 11076 bytes
SHA-256: b730fa9693413198ddcfbbde2203f9e1829ae1a60856e67e7a7aeaba6b6c88a1

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