Malicious PDF — malware analysis report

Static analysis result for SHA-256 78db13456f27b8e1…

MALICIOUS

PDF

92.4 KB Created: 2021-08-16 06:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e10fd86f74278567f1d72d069a5dc248 SHA-1: ebf503bab90428a731ab5b03045089f21286e6e8 SHA-256: 78db13456f27b8e1609854b3af8b44791cba3924f54c1713d70295177aba45ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains a link farm pointing to numerous disposable domains and compromised CMS uploads, indicating an attempt to redirect users to malicious sites. The document's structure and embedded links suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://hainescentreasia.com/images/file/472813553.pdf In PDF document text
    • http://atol-res.pl/uploads/file/jevofenexaronopatikax.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/ka6srth3n9ihfl33laqv20q661/18882778552.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/20856473636.pdfIn PDF document text
    • http://guowangcable.com/d/files/lerusapepod.pdfIn PDF document text
    • http://clingac.es/d/files/8473746903.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/95608860706.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/7494d4d9c5e16830014b75f0ddce3bfd/xemakowisaxagemukekazan.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084377d19bbd---wevetodekukujiwarugi.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9306a4c5fd---zuvikavesitixibatogupe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/bd27fa93ca6bf8d35dee404f633862bb/galitirofiwu.pdfIn PDF document text
    • https://htapigroup3.com/contents//files/zawivanumaju.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/zosad.pdfIn PDF document text
    • http://teifsepahan.com/files/file/3204044368.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/gavupejavudefo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/b40t98qsh0ucseiinu6j3f9eqi/laputokivopexajegegeleri.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/12754417281.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/bifufepesuburut.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/23305715814.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/0091957bd94f436fb8ca4b8e930d851d/14470725229.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0758bcaec4---55144669269.pdfIn PDF document text
    • http://talleresjpg.es/img/file/18497230864.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/vekajokipadamifolip.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/84434095597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=rapidex+english+speaking+course+pdf+free+download+bangla+to+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 17392 bytes
SHA-256: accb4884687d98007df1ac9f9dcf02cbb63f964d1bb7f6850797eafeff909bea
font_01_sfnt_off00011850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11850 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_02_sfnt_off00012dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD0 11464 bytes
SHA-256: ec6f0ff05b281c299d0fad73fece5f888ede4dbdeaf2ceb48fc9c62c09f5ea0b
font_03_sfnt_off00014883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1