Malicious PDF — malware analysis report

Static analysis result for SHA-256 205226177a8c6ef0…

MALICIOUS

PDF

93.1 KB Created: 2021-06-28 02:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e7cf2ff6953c9f62cb9cd380e1bea5a SHA-1: fc798bb7012432510c2fa8d5718ce0f5892011df SHA-256: 205226177a8c6ef0807f7675e6aaecabfc2812ea1fcaf95cfad2a841d0a6d8bf
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to compromised WordPress sites, likely serving as a link farm to host malicious PDFs. The document body, though heavily obfuscated, suggests a lure related to lottery winnings or parcel delivery, a common tactic for advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://umiyawoodworks.com/fckdb/userfiles/file/sonodedomurebul.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e69ceed4b---43548363247.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7a405bb9---zolakomoxu.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c8520bab9d4---97509293518.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7db34210f4---gokivizomekitufomomujogol.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b06edc6489b---93500733381.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/8495414399.pdf
    • https://ideylia.fr/uploads/file/22669864892.pdf
    • http://www.chatanakonci.cz/userfiles/file/vexovomugufalakiwanonus.pdf
    • https://laplacedesstores.com/upload/file/nafuranaf.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cd2d4068d---xugibeporasagiruzod.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/iiv4anashvk02bre01brvlm018/85803812705.pdf
    • http://msslink.ru/userfiles/files/latimevofoparek.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/6n9kffqisnc4108a1egf9gipe4/40420890846.pdf
    • https://pioneerlift.com/upfiles/editor/files/91160127505.pdf
    • http://sanarina.de/ckfinder/userfiles/files/16267835609.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d518aa07941---74405326012.pdf
    • http://quadocdao.vn/uploads/files/laxotujokomilu.pdf
    • http://nordicaluminium.ru/userfiles/file/19361430554.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895b12efdff---sozikotaw.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798d31d3626---lobusavuzazan.pdf
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/rewuxela.pdf
    • https://callmarkinvestments.com/callmark/files/26597923257.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=red+to+copper+ombre
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31a.bin
8785228f721698474a63149d4a48e77cf9d9cf5e8f224e3b288c1d458e47b8d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 17996 bytes
font_01_sfnt_off00012269.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12269 16792 bytes
font_02_sfnt_off00013a80.bin
75b2b7eb308132590cd9926c252ce80857677f78dbd2cafc814a9a57fe58a70a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A80 10288 bytes
font_03_sfnt_off00015166.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
pdf-font-stream PDF embedded font (sfnt) at offset 0x15166 16164 bytes