Malicious PDF — malware analysis report

Static analysis result for SHA-256 608aac2d26ae6c06…

MALICIOUS

PDF

80.9 KB Created: 2021-03-21 02:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7ed89d5cfd5dfe631e0c4cf9a3909fa3 SHA-1: 9a7ded74643939ef4fe102424373c80d32187f23 SHA-256: 608aac2d26ae6c06c7e7a6113a56ee78f25185a65aa45a8dfce6c70047b7f066
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically pointing to a suspicious domain 'mezovuduw.ru' and mentioning 'discord app user guide', suggesting a phishing or social engineering lure. The presence of many disposable hosting links further supports a malicious campaign.

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://mezovuduw.ru/123?utm_term=discord+app+user+guide PDF link annotation
    • http://rozogididibusar.sportsontheweb.net/xipunabote.pdfIn PDF document text
    • http://zopevaxawoxe.22web.org/stanley_burroughs_master_cleanse_diet.pdfIn PDF document text
    • http://rixivuk.iblogger.org/g50-45_laptop_lenovo_-_type_80e3_specs.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/frame_relay.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/apparel_manufacturing_book.pdfIn PDF document text
    • http://smirno.life/befodekuzewosipetekivafip5jl5.pdfIn PDF document text
    • http://requiredjokblog.com/39945795257j0ynx.pdfIn PDF document text
    • http://zalanikovuz.iblogger.org/bhagavad_gita_slokas_only.pdfIn PDF document text
    • http://abreudesigns.com/607346151764qp2j.pdfIn PDF document text
    • http://detonic-italy.website/how_to_tighten_bobbin_tension_singer98xsk.pdfIn PDF document text
    • http://sberin.xyz/the_one_kiera_cass_seriesi2mqe.pdfIn PDF document text
    • http://helpcreditscore.info/denon_avr-3313ci_reviewp305b.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://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_39297bf023614e809e4795ccf1f3fa16.pdf?index=trueIn PDF document text
    • http://dogamesesokuj.rf.gd/47874215135.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_01206f84231b41a88a205ba57a169ed9.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_c6ad816122fb478a952867f994394ed2.pdf?index=trueIn PDF document text
    • http://xaxobozebokawa.epizy.com/jajodekafak.pdfIn PDF document text
    • http://tekojexabutixas.epizy.com/libros_de_administracion_de_empresas_descargar.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/blank_periodic_table_of_elements.pdfIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/59960215831.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_09c7d3f995e9410db584e3fd15145fa8.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_bd60608cde584c378fec9f793ebc3736.pdf?index=trueIn PDF document text
    • http://kipejefanowisu.atwebpages.com/90541265797.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_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 4904 bytes
SHA-256: 66beeaaa3ae6c2bf046701becc9a4d9c1cc8461eacf9f4efa5f8844decf78361
font_01_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 11104 bytes
SHA-256: a551b75eadf7d994cfd4f6baeaa1c8d2487adbe6125a379a9d371a6b3455bb05
font_02_sfnt_off000127b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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