Malicious PDF — malware analysis report

Static analysis result for SHA-256 daaafeeb0675c430…

MALICIOUS

PDF

86.3 KB Created: 2021-08-31 05:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: f94fcf1dade51f3c3fe514797f415f13 SHA-1: 54b8999b67f50bc161bb5e095e6b18ad075d0976 SHA-256: daaafeeb0675c430e28ef09cea3920f84b42e96d19ac3e28c62b77a8bb3a864e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://irlanc.ru/uplcv?utm_term=1966+mgb+gt+for+sale PDF link annotation
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6b145a877a03874dc263eadfed76995f/xuzosojunosagexofi.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/junolulepen.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/majike.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc811b693dc---52589412797.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/lawilivimidepezege.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/xinubuzof.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/zabatozugiruxurat.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/005e97fdd4656328ca89b0539837e13f/nenexowalemewiwusefura.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/60514531307.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/jebujorewutiw.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/mejosidelirufafixajebam.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/naxusatos.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ek8ni1v54lfmcn25o20h3d2n96/27322343140.pdfIn PDF document text
    • https://esz.jp/img/editor/files/viwevipipipofawobina.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ggujdi8fjddrsaiu9at784b19h/2750608695.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aae71662b---10969939198.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/rugupemobozativeg.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a18016e217f---kiwanunixeva.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/loxumibugexumelujufukepu.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/kuseforumolotanexisuki.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/47443322081.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/dubifutuvezunukoven.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/27423446024.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b93828c82---pumemowopogadatoruxas.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/xapukexokolamulirexeloj.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952165bf953---53846721191.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/nipewo.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_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10792 bytes
SHA-256: fcfbbb7b00790bc96f4979359d3318efdf520b2a3deffafe740b35c0504a1cc6
font_01_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 18596 bytes
SHA-256: a5a902a71eb4fada60cf5c2ee8c581e331586507015b78e5c020bca95508608c
font_02_sfnt_off000131f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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