Malicious PDF — malware analysis report

Static analysis result for SHA-256 8283be3863443122…

MALICIOUS

PDF

85.2 KB Created: 2021-07-17 21:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d444e3022e500d9556695c9849037781 SHA-1: 218b48e65a4c68fb660da5b30b840653d709c986 SHA-256: 8283be3863443122c98f35e1a72106c393fc16346ed71a0d130e07d2b4a5ccf2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of embedded URLs and the 'download button' heuristic indicate a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 http://abwcockeysville.com/uploads/files/gotoxagudomatosir.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160aa98f4073e6---93821291159.pdf
    • http://jiuxingchaoshi.com/uploads/file/020744567364.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079cd3d5dfc5---makudipipale.pdf
    • http://banhangcongnghe.com/upload/FCK/file/fopatenosakeropakizedunal.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/219bdd5c1084050abf54b691f75bdfca/26518083576.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/jt6gstkcf1naejp06q9kitkf5q/ropemaworosow.pdf
    • http://casaatlantida.com/userfiles/file///xiwovirowuta.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3be1gif6mfao3qnpvtn82j83pr/19910301298.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d1cc38517---55886162958.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ba7c21d1306a3e96cf4b97f13025f2a1/lejitowaxasuti.pdf
    • http://alpha-th.com/userfiles/file/sekefutojema.pdf
    • http://canvangdientu.com/images/file/sijomemede.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160973ab1cc07a---zezovukupufumabavebiwugi.pdf
    • http://musthighschool.mn/ckfinder/userfiles/files/goxazibimerusirimabiruz.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/4bde0b077941a6977d1f319bf7b90c22/vavatepozuzelaputovipaj.pdf
    • http://stpatricksreunion.org/clients/84553/File/zifuzavibulak.pdf
    • https://luminex.pl/upload/file/5512542523.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608244af00266---dufuwukuxawulapexe.pdf
    • https://wasserentkalkung.at/ckfinder/userfiles/files/zorivomokerefewawanerenex.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089adc0e10cc---rulira.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e0151ecf0dfa152b3375282fb19e0762/52415437950.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083094973b55---49029724919.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+train+to+busan+full+movie+in+tamil
    • 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_off0000ea52.bin
f636ca833a6266250062a571d508408204d79b4fe73ff316e6be9fc73e3d3f96
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 10908 bytes
font_01_sfnt_off0001039d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 16792 bytes
font_02_sfnt_off00011baf.bin
48de8675ae060a4f67ddbec62708ec5e50393efda8b70caa4e22216fcb786a63
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 16668 bytes