Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0148f0446d91567…

MALICIOUS

PDF

90.4 KB Created: 2021-07-21 14:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 181e615320459207c59d89e03cd04ef3 SHA-1: da203a4d21af3468d822f01b5f99cdfbf057ef0f SHA-256: d0148f0446d9156799bc999cd0c38e1d2a39be82791961d852a3711bda2c2e5c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites, including one hosted on WordPress upload storage. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an intent to redirect users to malicious content, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://christianklein.eu/Quansis/ckfinder/userfiles/files/metezuvutut.pdf In PDF document text
    • http://biurod9.pl/public/userfiles/file/42594115975.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/203efd7cac6b12b50c19166ce141d1f7/xotufosigibakofizutuz.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb100db2351---fonufakalepabovotop.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/l2fltnv72bkrcfabhdq57q7e5c/52105625503.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9a10a736b---tisevipuperenapiguxulomen.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/fepivinotuvina.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f1d5775735705bfbac187b1ba5bc4e19/juwisuginezitudaxarokuwud.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844cac09bc---levekixosudakeluvogiminaf.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/67509894736.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/t1q0fpv7e4444ksq2atpssk8fu/jomaxugas.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/fukepumoresule.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd9f60f96e---jisefewemaso.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/4962d44332494fd0e6da61f4671802ee/48440809724.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5ebe2be3bdeab1422581f1d1399e59c3/23524955826.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecabbc15a85---xokerisuxinafukujixebuxos.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/27543203717.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/21hjk5mgbfos3sb6fvc0ksn5il/48810651993.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/34041577603.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/uf6l2a44sqeqt0tlrfmtgqsa91/29590422204.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/bivavajoronovisokuroke.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e98d695b9---mepefusidipikufaj.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/51076590755.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/kekofununoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=check+stored+wifi+password+androidPDF 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_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 17212 bytes
SHA-256: 842b3d3f87876a7b7f3960107b4545377f95569fa518b49daceb4633537ed775
font_01_sfnt_off00012b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B14 10880 bytes
SHA-256: accfedda638da9a1989af0584f8a4df6524c56a04d7321b2dd58da246f2268e6
font_02_sfnt_off00014457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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