Malicious PDF — malware analysis report

Static analysis result for SHA-256 794fe77eeeb17e8a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 08:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4dae48e2b4f65db27bffeb41507ea5a0 SHA-1: 62716aca61dd474f8924029bf6ceb6df1da4e96c SHA-256: 794fe77eeeb17e8aa6357c5dd098c1579a51579578ce4d2ce2e538a0b78e400a
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure as a link farm is a common tactic for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://queure.ru/uplcv?utm_term=why+is+my+data+not+working+android PDF link annotation
    • http://bertrandetgastineaudesigners.com/userfiles/file/zolibinu.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/59442162904.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/dabakat.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/14206766163.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614592aa00aa0---34947790750.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/nomobibejavunolajuwulefaw.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/84081142988.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/52776137521.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/24025362383.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/balomudemimekajurud.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/71864803836.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16143ba8f37b53---34511754730.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/19639739758.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/99060915810.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/guxumexazijozuzo.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/fozefagedi.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/89242829586.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612efa7b2cfc2---kokedopizasimagox.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/81894368952.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/47f9e47c780ed7fff4f05d857cae6961/nowul.pdfIn PDF document text
    • http://vlajamo.cz/images/file/xojupowafifoxebadolor.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/fiwined.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/93713463645.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/fugovetunajutegulumo.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9455e4f15---96159599379.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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 17656 bytes
SHA-256: 3e7185f93bd05e56550e2a650dd31f2204cd2ef2adf249cdaf3e854caf463f2a
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12144 10800 bytes
SHA-256: 4fc71dd3fc9f1719a3014accd48400b9ff55d4d829af8a1f0ce6fdfbcd8266a3

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