Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6c7afeae2b6183…

MALICIOUS

PDF

76.8 KB Created: 2021-02-25 22:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 212da461b7f48773e44254a7606d914f SHA-1: dbc12a360f12815ccc92b841b5f7fb2d6b33c5d7 SHA-256: 8b6c7afeae2b61839e548110cf75b2595ae4264eed9b5aad6d92501e9589838a
154 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to troubleshooting a Maytag washer, suggesting a lure for technical support scams. The presence of numerous links, including one pointing to 'maypoin.ru', indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=how+do+i+fix+the+lid+lock+on+my+maytag+bravos+washer PDF link annotation
    • http://bestsalestoday.xyz/snake_in_the_cube_3d_modelvbckn.pdfIn PDF document text
    • http://cethq.xyz/aankhon_mein_teri_songs._pkn30t2.pdfIn PDF document text
    • http://discount50it.pro/amor_y_respeto_gratiskoe6l.pdfIn PDF document text
    • http://like-store.site/official_vatican_museum_guided_tour43cmq.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/85443921272.pdfIn PDF document text
    • http://healthyforczechrepublic.site/what_is_the_pin_for_anker_a7726b53ul.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/15198131474.pdfIn PDF document text
    • http://weareanonymous.org/gebojapa1qxpm.pdfIn PDF document text
    • http://mklhhhh.space/solucionario_mecanica_vectorial_para_ingenieros_dinamica_11_edicion_gratisrpfui.pdfIn PDF document text
    • http://smartcreditscore.info/80252265122bg5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_5fd34c5909f73.pdfIn PDF document text
    • http://nicechange.space/pezopubiresevmvf9.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/what_is_dataset_object_mcq.pdfIn PDF document text
    • http://opticsystem.website/beautiful_pictures_for_mobileiw3g7.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://s3.amazonaws.com/bopuxosavubare/bopusemafedosodone.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/vijisolomuxigaf.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/wiguzogozojod.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/14996138848.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_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 5712 bytes
SHA-256: 5350ac221b5d126833060424c40608d59e2efbe56d2c8c00fe6c5b61b0d9d826
font_01_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 10948 bytes
SHA-256: efbd79cd0a475ae33b0d868e4da5e3463b58890c135a78c7e29bba0dc27a3207
font_02_sfnt_off00011781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11781 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2