Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71e2fd34d7d4fe8…

MALICIOUS

PDF

71.8 KB Created: 2021-10-01 10:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10419a36869cfa1764094311a2d09b71 SHA-1: ddc76190aaebc191dd495adcc8545448607e8b6d SHA-256: b71e2fd34d7d4fe86d5a07a4a3b7e811931ab7b8eeeadf870a5f773c5bdd0881
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • 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://smwebtechnology.com/arishayurveda.com/userfiles/file/kitineja.pdf
    • http://win-sonic.com/ck_imgs/files/14514571320.pdf
    • https://pesonabali.dswip.com/ci/userfiles/files/xotividulawivarenuruzuxi.pdf
    • https://amigo-shop.105h.net/upload/files/gemimutexitivesigem.pdf
    • http://cyklo-sport-servis.cz/UserFiles/File/94393857087.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/81184416266.pdf
    • http://centroolosprato.it/userfiles/files/tufiko.pdf
    • http://avtrak.ru/ckfinder/userfiles/files/rasenogodutepejofir.pdf
    • http://staropolski.net/Upload/file/19818927453.pdf
    • http://vipnovini.bg/root/f/uploads/files/55391338010.pdf
    • http://pzhjintai.com/upload/files/koxidejepukavonipudoju.pdf
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/54414325918.pdf
    • https://rheinfurth.de/userfiles/file/togidigujisusozanekivomul.pdf
    • https://zzwgjx.com/d/files/dipirupasosilagukeluluto.pdf
    • http://mkbeauty.vn/luutru/files/duladij.pdf
    • http://martom24.pl/martom/userfiles/file/gigewidofalofubuw.pdf
    • https://dichvuhappyhouse.com/upload/files/79737273707.pdf
    • https://rumputhijau.com/contents/files/13192237536.pdf
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/lunekotanonuvupot.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444b0dc6caf---jivotepodefilitowira.pdf
    • https://koratspring.com/upload/file/97881168936.pdf
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/lavozigijabejibor.pdf
    • https://zebcom.in/userfiles/file/lexatoxewe.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/56331147273.pdf
    • http://sobateracota.ro/mm/file/53929289648.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=como+crear+%C3%A1lbumes+de+fotos+en+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b355.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB355 16792 bytes
font_01_sfnt_off0000cb6c.bin
4368b7a7378f0d2cc3cbc82dd3d0732253701d17309663cfb1f1aa3e1fafaf02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 11088 bytes
font_02_sfnt_off0000e4d0.bin
d2053bbf92690ae7d351589543d391228526cd67bece4da5e6ad2b63611e57a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 16648 bytes

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