Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fbe4640d3139d0…

MALICIOUS

PDF

69.5 KB Created: 2021-09-21 01:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 125f3c6724e227102097efa47e06d09b SHA-1: cb66221bfd45856d79fdae3fa92cdd4786839425 SHA-256: f5fbe4640d3139d0432c40a89d707be13c3a7fbddbb858a82f7edaa4f21302e9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it's an image-only document designed to trick users into clicking embedded links. Multiple heuristics point to the document being a link farm hosted on compromised or disposable domains, likely serving as a gateway to malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=download+command+and+conquer+generals+android PDF link annotation
    • http://101-games.ru/images/uploads/files/87576221452.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/rafukolesalaruvadekum.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/02aba4a772e2211f2da2a0948c192cd9/87909512201.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/bemadekikume.pdfIn PDF document text
    • http://esejsc.com/upload/files/ganeboxaxigewumesipepopa.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/dajakudepojijal.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/37134597813.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/18191823637.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/47369428261.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/31935409708.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210917000745.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/94712703970.pdfIn PDF document text
    • http://519pf.com/userfiles/files/45229198787.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/41377680799.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/77459274394.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/52914541653.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/vulimazubadijexusekadakew.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/polaneze.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/1999459804.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109201701059573.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/63191887768.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a65a4583f6f445fe2cc7b46725b0b7df/zujejibitarol.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/77790522171.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a63e3c7338667443813f994f30a2688/50223269036.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/14757620825.pdfIn PDF document text
    • http://theshop24.com/userfiles/file/nalilidakivam.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_off0000b3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E5 10948 bytes
SHA-256: da5fe08dcbfa6864e8bb22a3815e7eeffa35fee4ebae0d260d979e492fbc974d
font_01_sfnt_off0000ccc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D3 14180 bytes
SHA-256: 7b6221bcae87ab38fbdee036055b0f31c9ea25032c583d3183a0c2fcd17e2dcd

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