Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c028c6cdb22b13…

MALICIOUS

PDF

66.7 KB Created: 2021-10-03 09:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b0a2a2c3fe1890e5074e49e2c0c83636 SHA-1: d76b7f31a8f6b35ee7c8f71b4cd8a3978766756c SHA-256: 94c028c6cdb22b13fcd9c2187bf8047debe2c340eb264c310a0bd8d8d247e7d7
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The document body is heavily obfuscated, but heuristics indicate it's designed to trick users into clicking external URLs. Several URLs were extracted, including one pointing to an IP address, suggesting a potential download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=tolland+middle+school PDF link annotation
    • http://apmnir.ro/fckfiles/file/47813841300.pdfIn PDF document text
    • http://groupkaishan.com/d/files/83557192258.pdfIn PDF document text
    • http://rld-carbon.ru/file/lavepufu.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/10893450771.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/laxegowusagidinasiv.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/15032683969.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/sulosumidifomijud.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/60467730132.pdfPDF link annotation
    • http://slsnn.ru/content/files/72168558369.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/38216312005.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/38798133403.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/55959824626.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/45946205659.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/93985433021.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/45627033339.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/74086140796.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/6347340171.pdfIn PDF document text
    • https://owop.challengersports.com/userfiles/files/veninaxasasanek.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/59088182514.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16145c5f0085db---92658939613.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/4slnpl8t69g2e5mfef14is6fea/66042838688.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/lefikewerave.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_off0000ab8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A6 10400 bytes
SHA-256: d2932a0e41d88354b94b1bf570fc4c792c2d738db5c4bb7218a71f7239f57da8
font_02_sfnt_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 14024 bytes
SHA-256: 3da0a6ca2d72154dd0a9905747c23c5641b4be707dd9cce1723431017f091a41