Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9c15f031718280…

MALICIOUS

PDF

68.7 KB Created: 2021-09-27 20:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8049494681fc782c08f41346dfeef516 SHA-1: 8041e0277baa40b4c15ae7ef4142ae20fdab07fe SHA-256: 1e9c15f0317182803dd4214371a7138199685b5cb3c09682e74b7447e779c2e0
176 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 heuristics indicate it's designed to look like a legitimate document but contains numerous links pointing to potentially compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://philabc.ru/uplcv?utm_term=nawabzaade+full+movie
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354b1a16831---50567632586.pdf
    • http://netart.hu/userfiles/file/guxajegijuwiwusisuzipim.pdf
    • https://dodatnagarancija.com/userfiles/file/vavetikasazodu.pdf
    • http://burfel.ru/upfiles/files/neribenozeduxasigedawu.pdf
    • https://www.assofmt.org/ckfinder/userfiles/files/48572155319.pdf
    • https://ce-mi.pl/uploads/userfiles/files/81292115116.pdf
    • https://walnutcreekguide.com/wysiwygfiles/file/zegarejifolazegor.pdf
    • http://lscapital.it/images/file/69272816603.pdf
    • https://austarpharma.austarchina.com/upload/files/71695815622.pdf
    • https://media-get.ru/userfiles/files/guzafuwomewivala.pdf
    • http://abwmercury.com/uploads/files/roxerato.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16139e5e29c9bb---10494680750.pdf
    • https://photopoligrafic.ru/ckfinder/userfiles/files/kapagima.pdf
    • http://brainbond.ro/userfiles/file/sofasite.pdf
    • http://acsalma.hu/userfiles/files/23244308037.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161516f0418c06---11387961961.pdf
    • http://ogledalata.bg/uploads/pages/files/47017108906.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/28ho1vbnvbmpd84ojo0lvbuo7n/buvigefojiv.pdf
    • https://vidaleve.ind.br/ckfinder/userfiles/files/43492815112.pdf
    • https://profix.fr/ckfinder/userfiles/files/wiposenosiligurikamod.pdf
    • http://e-sportis.com/images/upload/babupamuxo.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ef0ae93435f9cc593a8341382973d05e/13655048933.pdf
    • http://izumrud38.com/ckfinder/userfiles/files/31940757448.pdf
    • 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_off0000b221.bin
db68932ce750f4f9c4209706fb84fb0ad9fe9469668e1a3cec07a5b9b16064fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xB221 14240 bytes
font_01_sfnt_off0000d54b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 16792 bytes
font_02_sfnt_off0000ed62.bin
a7e24188894c5f7892a715abd96972a290f65f1b6ada5d88a1cac5a876be0509
pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 10476 bytes