Malicious PDF — malware analysis report

Static analysis result for SHA-256 7115a3f34a4ed54f…

MALICIOUS

PDF

67.9 KB Created: 2021-10-01 09:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 914a5092ad73f1beaf7543b0ad356c50 SHA-1: 544439d692cc5728f8c856d03168de655ee88f94 SHA-256: 7115a3f34a4ed54f9a75b4eb778b9b3633f120c8d589996768048fd1b2edb624
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, typical for redirecting users to attacker-controlled URLs. Multiple external URIs were extracted, suggesting a link farm or redirection mechanism to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=live+cricket+match+online+tv+free PDF link annotation
    • http://gocep.org/data/userfiles/files/tizopus.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021090711060123709.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9ecc0a22d---tarariz.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/rovokurerib.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/lofosutati.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/zunurir.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/47485019497.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/sufezerolezelopup.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/94428400638.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/rasojediwewafo.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/togovadox.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/pidok.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/rapezituzogujilidiwaj.pdfIn PDF document text
    • http://ukrfirework.com/images/file/wobivuvetufob.pdfIn PDF document text
    • https://veneziashowroom.ro/app/webroot/files/userfiles/files/13981207757.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/43404251066.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/74978673846.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/12213547963.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/55750705542.pdfIn PDF document text
    • http://aweibel.com/Photo/file/58400915141.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/xevox.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/gugituxubenafemoziguperaz.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_off0000ae94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE94 14092 bytes
SHA-256: d982796ef15608afb610d73eb9fe546ce1ec419b983d31734d2d1fa84f2b98e0
font_01_sfnt_off0000d1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10548 bytes
SHA-256: a0736069421b3bb76295ac6e20ab195349ec108892339475ee6af000e701a4c3

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