Malicious PDF — malware analysis report

Static analysis result for SHA-256 6654c232830a9edd…

MALICIOUS

PDF

90.8 KB Created: 2021-07-19 05:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 267b276e66ce221764fb1065ae0d53ac SHA-1: 1b3684eeca6c65b8dd172bcaf3c2d3a858927ea6 SHA-256: 6654c232830a9eddde801fd611079c023fc874bd637394839d3b27a23315fcf4
156 Risk Score

Malware Insights

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

The PDF file was flagged by a ML classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm directing to multiple domains, some of which are hosted on compromised CMS platforms or disposable hosting, indicating a potential distribution or phishing campaign. The document body is unreadable, but the heuristics and URLs suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ibextrail.com/editor-images/27110604738.pdf In PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/0u0mkapr1me73a8v5e5menv4dq/wesilobod.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608361fa5d047---buputiredovuzelug.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/54242812178.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6285477fd---14469594893.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/betinub.pdfIn PDF document text
    • https://komodovo.ru/upload_picture/ramokakojaxapavuwada.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b4e73c9fe---23918341264.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e2ef19a58278cd8087df0cb29ffd58a6/kokawezepirerin.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80994281230.pdfIn PDF document text
    • http://immopolignano.lu/images/warire.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/dd38c220019d341311523b04393af28b/moletenipugopa.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/viravanuzogiliwiridet.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ff5cc2f32---xofezakotekewofexigudo.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160800dd108977---bogodadajurekiten.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/wetapu.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5051512f---pusazovivibozozetivamun.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/abb43dce3f35abaef075d8e6cedb4fbf/lagokaduv.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c3666e9fe42836898d6bf9ab6c7c2f1a/dufogomidivutuwijonif.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/11917823904.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/11626763080.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/70157256833.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+much+does+it+cost+to+have+a+new+engine+installedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11823 10960 bytes
SHA-256: 7c0a9ce9b7aa3debc1dbb10933a358af85d98ae575ee27611221fd29e9a39a1d
font_02_sfnt_off00013137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 16952 bytes
SHA-256: 6a1d0c022b8b8a64173231dda9bdec8292928923eb568f7b8e6bf83d90cfeffa

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