Malicious PDF — malware analysis report

Static analysis result for SHA-256 986f6997a75602d0…

MALICIOUS

PDF

86.7 KB Created: 2021-07-23 03:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d99158ac0742db9bbce87c08f5e1344 SHA-1: b8bb179d06094ee803c2fe82c2c82bca91a3d27a SHA-256: 986f6997a75602d09d62345d480479c7d22f529d55bb190297fc4b18863db2d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to compromised CMS uploads and disposable hosting suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://banquat.com/userfiles/files/lamavepavivobagupaju.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71e327a44---16895829882.pdf
    • http://novussiteyonetimi.com/uploads/file/nepigewe.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/398b552e92d77ef0edd695b1b69d4742/wurilezigaf.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/rogekakozizonelefukudimo.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607898a4e4a8e---tuwanovawi.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/004c4eab9fe10f40fbaac23098097ac1/wobateneda.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/017e23bd1fc9ee093529b58f2a67a418/75106387951.pdf
    • http://herium.net/FileData/ckfinder/files/20210628_CCD56C2E74885422.pdf
    • http://humanitool.ru/userfiles/file/lodoxobilesove.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8cb41cbeabd6034f6a12b7a30a2f5a9f/81033180842.pdf
    • http://elementsgogreen.com/userfiles/file/segosoxe.pdf
    • http://luckdidea.com/ckfinder/images_store/files/38861389053.pdf
    • http://sharidyer.com/clients/863431/File/vezuxovuzifewabu.pdf
    • http://snailgame.ru/upload/files/20210716231940.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ad269c505386ec876a338b16e4e70daa/ridiwo.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080bcb42f2a3---48571680387.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083664a0a62b---77823079691.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/v9307257jncq1mtk8hidc6t21j/kagasudavukekitibajuwapi.pdf
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/dafetutukujesano.pdf
    • http://prinsart.ro/uploads/files/28113625532.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/684bed54f25fb02f5eda2300b9cac261/segazelarezol.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b93f535ffeebbab97da7cbbbccf50c41/92480568968.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=prime+gaming+cancel+free+trial
    • 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_off0000f003.bin
80e64154bfabc9a1aec7f74055a615e821cac407cdcc47ce6a499fcab99bdb82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 10392 bytes
font_01_sfnt_off00010779.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 16792 bytes
font_02_sfnt_off00011f8b.bin
20fdb9918987d5de85d1cf658e1ff1a7c82a9d4a55ded55d4053cb9cfe0fd06d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8B 16744 bytes