Malicious PDF — malware analysis report

Static analysis result for SHA-256 3458d25a6d72e589…

MALICIOUS

PDF

90.9 KB Created: 2021-04-10 00:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 98b11496a413642148ba1fedd0937b9b SHA-1: 95c3249a199cbf33c61fed32b17aacb324ca5e5a SHA-256: 3458d25a6d72e589f5a4fd232a2f257df80cc2cb821032237040ca0cac604476
126 Risk Score

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 0.9997

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://mezovuduw.ru/strik?utm_term=heat+and+glo+fireplace+pilot+light+out PDF link annotation
    • http://prizinsta.info/basic_computer_science_questions_and_answersclrj4.pdfIn PDF document text
    • http://getporte.xyz/35803690816xi1eb.pdfIn PDF document text
    • http://winoraama.fun/52972202694srt3l.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/ij9icfm/iron_maiden_legacy_of_the_beast_tour_dates.pdfIn PDF document text
    • http://cetapp.xyz/89515868214zuwyb.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/cnijfib/snes9x_gx_wad.pdfIn PDF document text
    • http://businesshelpservice.com/broadsheet_best_brunch_melbourne_cbdu0jer.pdfIn PDF document text
    • http://mnclassis.org/the_art_of_french_kissing_bookrfky7.pdfIn PDF document text
    • https://pikuteki.weebly.com/uploads/1/3/4/4/134459105/3582733.pdfIn PDF document text
    • http://shopwithsale.website/fopigigunosipefivu2jh42.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/nilelado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mabiwariw.epizy.com/asmaul_husna_song_mp3_free_download.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/assertive_communication_worksheet_therapist_aid.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_ff0fa137f4144705a0cb9ad065c22c8c.pdf?index=trueIn PDF document text
    • http://duxuramubot.epizy.com/7_habitos_de_la_gente_altamente_efectiva_ebook_gratis.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_67fe1aa8706f4ccfb2cb2c06d9152b4a.pdf?index=trueIn PDF document text
    • http://vivizegijarugip.epizy.com/85791995093.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_34fff4c6351d4150b018e779e1188f00.pdf?index=trueIn PDF document text
    • http://zujifonep.epizy.com/famatakugumitoson.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 5200 bytes
SHA-256: 85082811813ca45d7133c7b5222e6505002cc4ed5de2b65392d32edb488d162c
font_01_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 20260 bytes
SHA-256: 3a64638074ffbe847a1f339c5ea84e1b1992613579ac5b3dd3b1a5eafd38ea4f
font_02_sfnt_off000148db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DB 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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