Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a726790bbb235d…

MALICIOUS

PDF

84.2 KB Created: 2021-07-05 02:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e681c1c9585f5362c00ab1d0b614fe1 SHA-1: a9a96547edc31f585c2a13357d1466d943ae7404 SHA-256: 02a726790bbb235d52c280453ae63469684887b0982f7d869d85b74ec75468b2
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/866757149833d1587720ca0114bcae89/99160702396.pdf
    • http://sevimticaret.net/userfiles/file/33275333765.pdf
    • https://subarini.ro/mm/file/46509693498.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ojk8jlj7hbrb7ej0c9hvgaqkhf/ziwajafiked.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0f8bca6cc---lokafop.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da00073520a---63957111821.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160918ba0a1d17---soxesukonomofubopofu.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/d5de6cc7af589b2e5347e3a77cefdef6/38232849425.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160808977385db---42184491653.pdf
    • https://annjulieskarpmo.com/userfiles/file/lugisitenamosuwidunaxuxo.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/1d8d080b69c71450e9fdcd4d33f1aab5/bixezilawuzaz.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bb12a52ad---zobus.pdf
    • https://argumentua.com/i/file/5521458920.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc373110c91---3137952804.pdf
    • http://danielbushreunion.com/clients/41596/File/zodipovobom.pdf
    • http://magicdiscoradio.hu/userfiles/file/bekuvimevabiperi.pdf
    • http://bigdoughpizza.com/uploads/files/37275139382.pdf
    • http://ahxxzx.com/userfiles/202104/file/fisibibafiruzufimilabek.pdf
    • https://ikitellirezistans.com/upload/files/gopujaguzavisefob.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b095f085273---64769826309.pdf
    • http://altelaw.com/uploads/image/file/vivunumo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=peoplesoft+general+ledger+interview+questions+answers
    • 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_off0000e6fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 16792 bytes
font_01_sfnt_off0000ff0e.bin
cba4dc1c31431e140fbf152ec32be0d74bc259a2b2219a080a32546a75fc6056
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 16476 bytes
font_02_sfnt_off000129e5.bin
00ea0403ff76cdc6a3b54039bbf769fdd726cd7acf656406117c81d7c2cf4117
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 11072 bytes