Malicious PDF — malware analysis report

Static analysis result for SHA-256 8703f318f230f4e5…

MALICIOUS

PDF

77.4 KB Created: 2021-04-22 23:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a8120dbee56e9a8ea2d59432ef3438d SHA-1: 5925607818826ce423c845fb343fdf6179ffc39e SHA-256: 8703f318f230f4e51207988720f6c06b42643e7f3c993043daa4dea9d572c0e5
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 0.9991

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://golowaki.ru/strik?utm_term=why+does+google+maps+freeze PDF link annotation
    • http://totaxusozavu.sportsontheweb.net/famous_psychologists_and_their_theories.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/gihuggd/xomizeraminupajexesonawir.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/ijjehil/ziriz.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/jilesevurixu.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/ansi_150_rf_flange_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/i1jdFhg/67888497044.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/fgjaghZ/game_loop_cod_mobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fb849abf-a639-4330-b718-7f440639b386/tokarob.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/53730169896.pdfIn PDF document text
    • http://gigidokolud.rf.gd/85490151144.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/98555515419.pdfIn PDF document text
    • http://fidikaxano.myartsonline.com/ryobi_31cc_weed_eater_fuel_line.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/67916103779.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/wagimeteni.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/online_banking_services.pdfIn PDF document text
    • http://zijedan.atwebpages.com/63241076254.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/97215038377.pdfIn PDF document text
    • http://falufobi.epizy.com/asylum_for_the_feeling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a758b6-ad98-4dfa-8c96-5c910ee15e27/how_to_build_a_low_profile_coffered_ceiling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c92a7ac-d71f-44d2-8cb8-ae031987a77b/jafuseroza.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/new_android_offline_games.pdfIn PDF document text
    • http://labazesunug.epizy.com/divisejupalesedexurim.pdfIn PDF document text
    • http://wirileso.epizy.com/98060746236.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 5172 bytes
SHA-256: 53bcd903e58f7d08f9ff44c7b0c8a6dc5c8fc2e513b5e034c1b1663ed00e61ed
font_01_sfnt_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 10248 bytes
SHA-256: 1c299314356f8d59d251bf01a4f87e87c8bcb5f7346b59d84c986fc4f1dcc447
font_02_sfnt_off00011a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A03 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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