Malicious PDF — malware analysis report

Static analysis result for SHA-256 034881b0979e49c5…

MALICIOUS

PDF

75.3 KB Created: 2021-09-07 01:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fed5064ee5449cc76e164585ee4e8802 SHA-1: c58006c079ded191687c0fd3a6d379aae4b361b3 SHA-256: 034881b0979e49c5a6a5957bf35116cf95a93baf6acc3d62107f0080ba7f5a7a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs strongly suggest it's used to redirect users to malicious sites, likely as part of a phishing campaign or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=best+buddies+program+manual PDF link annotation
    • http://yourbuilding.ru/userfiles/files/viken.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/tunove.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///30190965538.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/nidawuto.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/6cc7843fc2fce7ccad0bfce7e6d85bbf/95146958697.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/52978048285.pdfIn PDF document text
    • http://apvn.info/userfiles/file/vonolivuzi.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/bugogetagiwam.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/degisapidaxajikurugu.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/palesatatowexiwaninotimaw.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/xopexuvanimotokiruxogon.pdfIn PDF document text
    • http://dgjst.com/upfile/file/notimoxiduzagobuvefisib.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/5hejs4dmtm92kl9ckjlpmapm1o/76419304957.pdfIn PDF document text
    • https://ocw.tw/uploads/files/85550202667.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/pvhh8hdh2egjrvtslmjl2todh2/digozurovavuvenididumu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2bdloq8rvgkd4tk5o7su1a9akk/64598995769.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/danifalusabu.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/mifuxokojedidokefex.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074b786542e3---budofamusalikawuz.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/vanedogulejulemot.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/wogemo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cff87ad5a71---99470603294.pdfIn PDF document text
    • https://ancoraeducacion.com/images/69241663981.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24B 11028 bytes
SHA-256: 8822a4a87495a664f32d135f67eac7fd26d830666840513ea1714044eaf43eac
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 16844 bytes
SHA-256: 874c081969c9b9959d2ef41159c0ffe1a59aefde686b491a6e6680227b3191ed
font_02_sfnt_off00010713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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