Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f47808640ce72ce…

MALICIOUS

PDF

83.7 KB Created: 2021-09-15 19:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 177f276346c491d6d55721085a5461dc SHA-1: 8bd106b3d5913c2b6863de086de24f9f5319867f SHA-256: 5f47808640ce72ced52bcefff44799ba261a56711860b49716119d4af6f3dae7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=hunterrr+watch+online PDF link annotation
    • https://i-intelli.com/ckfinder/userfiles/files/mesuzol.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161354ae2e7303---2288454186.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/94864957998.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/puxataruwalonin.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613db6f68947a---benep.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/lovitevuda.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/fupavusivexu.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/6959706832.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/zixumoporubijavoxewipone.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/79580890095.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/59426314771.pdfIn PDF document text
    • https://jotelek.hu/files/file/lojexeferibinolaledotadod.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/31239422473.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/93355496697.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/fuberega.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/lijevotebuwogeroreb.pdfIn PDF document text
    • https://flomogroup.com/upload/files/puxukozemidudobipujes.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/od5m7oafo1bd0n2nrh5nom7jk6/mudatixujuvizebegugivi.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/leluravupa.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/eb9rh6t1fdg765j3r5tbgo4c3c/81843493934.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/dimamabujisozumiw.pdfIn PDF document text
    • http://machin.kr/userData/board/file/vilobidakirojajivozuwofoj.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/kenika.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://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_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 18168 bytes
SHA-256: b258cd5be5ea9e0c665fd3ad1ebdbe88d8c6cc76e0010c2646c55edde8e12a1b
font_01_sfnt_off000111fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A11 10336 bytes
SHA-256: 4773a56b606d708b96331eebad1e3816a64595499f15524c938312696025f47d

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