Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd875c76a1094dd…

MALICIOUS

PDF

86.7 KB Created: 2021-03-23 23:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c62278b5598ca5a3e2cb03bda7c2f436 SHA-1: 55e3a807e441ba8c1c0bc8108c0f8e63191c6008 SHA-256: efd875c76a1094ddf3064e8a78be5bc50236f74504428858d589d2aa08c16896
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 0.9996

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://jottigo.ru/wix?keyword=turn+me+on+dead+man+2009+soundtrack PDF link annotation
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/4534825.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/laboratory_safety_procedures.pdfIn PDF document text
    • https://zumusikibalagop.weebly.com/uploads/1/3/4/0/134096359/jenebezopego_gixagogutume_varenev_vagepo.pdfIn PDF document text
    • https://cdn.sqhk.co/ximosufi/Lpjjggf/bafemaxofonar.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/liwiwamesovin-giwebuzix-suvawovolo-wukulat.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/RN1Gibl/3d_draw_joust_shooters.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/1be6cf07.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/bxgcGfd/skip_bo_app_for_android_free.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/gijurubotazorejadu.pdfIn PDF document text
    • https://cdn.sqhk.co/gekakisoduvo/hijhjja/art_history_masters_programs_london.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/vibugofogowoduvemupabok.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/subipiko.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/8673785061.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
    • http://bakakixutuv.myartsonline.com/affidavit_of_loss_sample.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/the_all-american_slurp_questions_and_answers_class_7.pdfIn PDF document text
    • http://ludezowitupaxel.rf.gd/68283522045.pdfIn PDF document text
    • http://xijujoxeta.rf.gd/xofabegituliv.pdfIn PDF document text
    • http://puvatazawefo.epizy.com/icebreaker_games_for_adolescent_groups.pdfIn PDF document text
    • http://bigofuzov.epizy.com/wiwozonosifuxubeniwofi.pdfIn PDF document text
    • http://xawavejemefo.epizy.com/60091897862.pdfIn PDF document text
    • http://revogip.epizy.com/attalea_speciosa.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_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 5332 bytes
SHA-256: b52cfab6e6a9f9fe5021fbf9c5df2f629a59a8e53031a1771183a0de98b1dea8
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 12816 bytes
SHA-256: b733483b595235caf94217facab346f5edadd0e2b753424f05e0364adee98440
font_02_sfnt_off00013ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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