Malicious PDF — malware analysis report

Static analysis result for SHA-256 59706b0b162bce95…

MALICIOUS

PDF

73.0 KB Created: 2021-05-25 09:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba8968c43a42c219316b5e92c97fb74 SHA-1: f6426b99b182e9f0ac98208aa101811ba8e0d4ca SHA-256: 59706b0b162bce950b7d9bea464758076f58e04c66b253a168a80378b89c3b09
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to host and distribute malicious files. The document body, though heavily obfuscated, appears to reference an 'Amd driver autodetect tool', a common lure for users seeking software updates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608713da04450---35595699270.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/85202043117.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bed49225a---didevesaxijofoberi.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa56825290---62221322337.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160775a8de6d34---34250255990.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3914093167---juvupopolezupeturewite.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2b372e06661305eacbb32bd33df93dd/25167014453.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160949fb6ad972---nedigosesuzagepojeponi.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mqq21egbbskarmm9k3b3ldht67/9884916706.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0pm3nqkc8vhs6b4uvhbpjmprc7/tarupubobanoxen.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/0ir5tncdln9htavfbak9i76n1i/17328804477.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/bdbe1cfe915ebb37c42b0934b461991d/tivojosisi.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a57b37aa---53321890179.pdf
    • https://alexandrapanayotou.com/web/images/static/file/74066447887.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a45f722b4f---75695361626.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607d34fe5cbbf---muwadomiwejewumarori.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d86b99bf---vugufebafolaxulorizagete.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9d1f3f71---witige.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085291439d8c---45276533364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=amd+driver+autodetect+tool+32+bit
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d59a.bin
4dfc3dce911de8e965730c41783e3ce5975515b19c7b3bc680b6270e0637cd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 5392 bytes
font_01_sfnt_off0000e7db.bin
87c712bb9ef2c4f485db5b93249e88bd234b40d72a443b181ee7568551ac4e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 20100 bytes

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