Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed49bf3aaa87ec6…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 03:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3776967bd3954fb0cad7f79ff761f712 SHA-1: 77cb36c88f4b8b249c68348a9ad3eb9b841d9368 SHA-256: 2ed49bf3aaa87ec657f0f959772d73cb14eef56963d3a666b7952a31e6c82855
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it's designed to lure users into clicking these links, potentially leading to credential theft or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ketchas.ru/uplcv?utm_term=planilla+banesco+apertura+de+cuenta+pdf PDF link annotation
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2835f1336a4815d534c4b437c3abd4ce/sejububat.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/pubuxixukeritisi.pdfIn PDF document text
    • http://artospace.com/pics/file/30035023119.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108ab3b07b0a---dulivalawizixugasewi.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/56274276894.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/95058182888.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/42916185118.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/36263691621.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/lo3501jmn8mo4c5r5fkbokfom6/84411083895.pdfIn PDF document text
    • http://186086.com/upload/files/mujexudonurubididilufanaf.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/limuzajeje.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/28320398606.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210801070838.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/gamujogebugevumuja.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/76838732633.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/3320605e148d734bdc674bd5919d3098/29415791513.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121c19c14ca9---zobepejinujelinojedaf.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/keniv.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a184dbd9161---wovominepuk.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCA 19436 bytes
SHA-256: 2d8627d38fa2718190e7c31605c86db6590625c9aaa505b12faf695e3c0fc997
font_01_sfnt_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11910 10856 bytes
SHA-256: 09b268dc6bcc682c9842f4820cbe4e74253969db7f35298be641136cbb430332