Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe989e07ef23c31…

MALICIOUS

PDF

83.2 KB Created: 2021-07-19 23:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c7772611025f036698c625ed99cd8700 SHA-1: f216d1590cc0c80c0ec53556cb584834edc5a758 SHA-256: dbe989e07ef23c3135dfbf1698ec2809d110b109dd993f62c9a4b21e8884df7c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous unknown URLs, many hosted on WordPress installations, suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/lp4igaue5rojkakvu7132qim5b/wavoxojikivusugijozi.pdf In PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607962a900bd2---2446022161.pdfIn PDF document text
    • http://carszana.com/image/upload/File/66007319929.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/pulepiwavuze.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070a46c8dc31---vepubopixawuv.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/jiresepexelidimafeko.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85b4d7f192---18592243387.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/60056704619.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/tarerupajajanolumafonam.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/sepitudosizewawewozu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5espbkr63q3c04ludr5j6fc6h1/76849967554.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a26bb511280---tupigutejirenusitida.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/gamitemepewi.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/47534051068.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9c1d4d14bb0ec584256bd940e2a15b12/dixedubegumoxirivulitokip.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b39d3fd10fe72f699cb7939c02879bc7/tosanitawedibefewurupo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160deb8b30251d---lepegadubonexokurutizos.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/96482104631.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mpndschrdlaej7fopuk2jn5qb4/34724901789.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/nrn5hgva8egja9qloghp4uitl2/lazeborukefawaleri.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f800c2d90b---1476329328.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/94003198866.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e320a49a80---wenametasemakep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=download+justin+bieber+as+long+as+you+love+mePDF 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_off0000c0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EB 11228 bytes
SHA-256: 6f5f6e27e333fcdb9fbc355b859cea4ba7e9ff96f3567c836e58183e7cb18abc
font_01_sfnt_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 18268 bytes
SHA-256: 93524cf8fd285b6e19c5b843a4456dd6baa242fa738113c23893e3535e4bcbc1
font_02_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 18000 bytes
SHA-256: af5ec11ba9466bcb648dbf0ae65b4be54f5d2faf87d761c9a45a09963c9528c8
font_03_sfnt_off0001246f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.