Malicious PDF — malware analysis report

Static analysis result for SHA-256 434e70347147c7c7…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 04:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c3196ae3d7c709dd63ea7f1cdab14bb SHA-1: 8ac953958d92bbce296b6ccba1187043a2da386e SHA-256: 434e70347147c7c75f7c5cbd9aafb00f62701c9a879664b6bab31444beb61815
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely intended to trick users into clicking embedded links. The heuristics indicate it's an image-based document with a click-outward action, typical of phishing scams. The numerous external URIs point to a link farm hosted on compromised websites, suggesting a multi-stage redirection chain designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://catamma.ru/uplcv?utm_term=do+androids+get+iphone+emojis
    • http://kayapalinakliyat.com/file/8481122744.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd53f5abf0e6f1c50b17d7552b8e8eac/pirijawuribepuzotezolar.pdf
    • http://bnblspecialities.com/userfiles/files/51804360350.pdf
    • http://quaisetoiles.fr/img_pages/file/xefipuvu.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec02902c9f---10666810842.pdf
    • https://pmapmc.com/userfiles/image/files/sizotazumanajal.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a383c7cbeeb49f49396be9c372cdd067/liboxifugopodamaxafu.pdf
    • http://aroma-es.site/yamituki-n/uploads/files/jivafoxa.pdf
    • http://degrossier.nl/uploads/file/wemepilamunonipixukovu.pdf
    • https://ijaetis.org/ckfinder/userfiles/files/xegizijefewimuj.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138b10c41755---kidijafutomerolubozow.pdf
    • http://velapower.com/glwh/UploadFile/file/2021091518545273499.pdf
    • https://goldenlinejsc.com/userfiles/file/tosox.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137ade0405fb---97060541051.pdf
    • http://osingenieria.com/images/admin/file/81537393928.pdf
    • http://kiddeefire.com/media/userfiles/files/bonuxemenabulewibakejup.pdf
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/pamenugeg.pdf
    • http://barudan.hk/UploadFile/file/20210914165708269.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/qfs1l4jlmme54jp9lqp1i5jdi6/guwajevivesifed.pdf
    • https://lufty.cz/UserFiles/files/19267160264.pdf
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68158362706.pdf
    • http://aldo-ins.com/userfiles/file/vivepajewojekaranezajakul.pdf
    • http://goldmustang.com/files/files/61694298489.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_off0000aeb5.bin
143ec379e1afe1d93e8a4792e1bec43050ce3a5a69cda88fcb76a31f8cb3e2e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 10924 bytes
font_01_sfnt_off0000c784.bin
04b84404489885d35d1907973f7373561ecc22c53f9230f315b3297d0f2c997d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 14104 bytes
font_02_sfnt_off0000ea49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 16792 bytes