Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d76bac27eaf69d…

MALICIOUS

PDF

73.4 KB Created: 2021-02-18 07:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 11aa3fc870f722a9838edc182c0e317c SHA-1: fd78b7ba4bc5a847c380e5995826c8743756d3b0 SHA-256: 67d76bac27eaf69dce924bb71e90e9fd2716243bda9b8cb6ac5fd4bca3733a20
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing the user to 'baarspo.ru' and 'websporizle4.com'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a 'cuisinart coffee maker', suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=my+cuisinart+coffee+maker+is+clogged PDF link annotation
    • http://websporizle4.com/papokozitquljj.pdfIn PDF document text
    • http://icub.tech/wovixiwawuwusf43k.pdfIn PDF document text
    • http://topcreditscore.info/converting_kindle_tot4c91.pdfIn PDF document text
    • http://pihodze.com/234753909728i8kw.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/minecraft_hayran_haritalarC4B1_nasC4B1l_indirilir35z8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_6001c380caff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5fd388b45191c.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/3894064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377116/normal_5fe5b070378c0.pdfIn PDF document text
    • https://vipizavubo.weebly.com/uploads/1/3/1/4/131407691/8732380.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/3186512.pdfIn PDF document text
    • http://idealica-uficiale.website/google_slides_tri_fold_template99cct.pdfIn PDF document text
    • http://xruhdfo.site/sexokilisosemoworunazida80uu0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/25405636895.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/kulutagumubarijisopu.pdfIn PDF document text
    • http://wosazexawejusu.rf.gd/junior_architect_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/flight_simulator_aircraft_free.pdfIn PDF document text
    • http://gizogebinide.rf.gd/98805566129.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 5512 bytes
SHA-256: 30a35a9eb33bf8af61bcb76a30b005eca3e0fda385342d2250d70cb5904ed71b
font_01_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 10672 bytes
SHA-256: cba7e5f5276ebeb10282b11353ca3f250a08c59dcc6d098c455be8f6577d7442

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