Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e838f038649775…

MALICIOUS

PDF

68.0 KB Created: 2021-09-18 06:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1c8f1f3150b01cbd30469ccc26a9bd6a SHA-1: ab0584a0377c7a59615e04226e38f3b3d58d9158 SHA-256: 88e838f038649775e8cf1467e1c7103ee15d963c7163d80e5107695f9cd6cad7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, designed to trick users into clicking malicious links. The embedded URLs point to various compromised websites, likely serving as landing pages for further exploitation. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 68 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 http://itcbeautytrainingschool.com/userfiles/file/puxusitipu.pdf In PDF document text
    • http://playoz.com/ckfinder/userfiles/files/14078742397.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/mowurejalazexibowezaguvuf.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/54712181053.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/tojebibafonivop.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/82817316403.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/880f9b3e2669a7a62c8bd942b022fc60/mugomip.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/77317897225.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/76179425919.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/93565661991.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/44868579939.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ecd08e3ce---36776849473.pdfIn PDF document text
    • http://canvangdientu.com/images/file/fakisenifujo.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/76463488864.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161436d536e8fe---60045883755.pdfIn PDF document text
    • http://pileki.com/imgup/file/85223358289.pdfIn PDF document text
    • http://e-district.org/userfiles/file/20929355556.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/48573486521.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/lasetudujamawalawij.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/walinupujamojibe.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/95514506148.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/2918576950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+application+layer+of+the+osi+modelPDF 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_off0000afda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDA 13496 bytes
SHA-256: 48ef20fe46ce52e2be3e5f280a743088a14bc76ab07c5ac394476992daa53072
font_01_sfnt_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 10960 bytes
SHA-256: 8c8aa401bb816f45a057703ebea483159aad87ecef4b648184920aa3ca04211a
font_02_sfnt_off0000ea3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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