Malicious PDF — malware analysis report

Static analysis result for SHA-256 da893daf87690ebd…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 17:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: da6ef0641c0fe35e1e2a3240d3f67385 SHA-1: 71081823ebc066136fea0f62ccb73187a652d77f SHA-256: da893daf87690ebdff3d51dd98d94750a37f890a4b594e4e7cb7a6037bd3efd4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The PDF structure and embedded links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=dewa+poker+versi+android PDF link annotation
    • http://zafirkort.com/uploads/files/30315502617.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/pezowaf.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/70211295792.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/godebo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cad50e70e---nivexudebagew.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2477e3aadca19ea0456357addbbbb65e/93756525204.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/mupuxeviv.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/jomesosuga.pdfIn PDF document text
    • http://vanhacollection.com/images/files/pojavosezepizetenasak.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/purevenoliso.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/37191859410.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/roxuxowazubonenu.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/ximijesodolexobidal.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/38307588308.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/5177032194.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210915171532.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/kesorewivovujipomowoja.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/lajeta.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/3327085557.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/nadabuxuzakur.pdfIn PDF document text
    • https://limadelimon.com/images/file/19912496474.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/fawafiwusixofuxuzotu.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/xegazidaf.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_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 10484 bytes
SHA-256: 54d16b14b0278ddd1a49a10f74bce2b7bf3803ac68515fee2f57fb70c57b6f65
font_01_sfnt_off0000f171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 18416 bytes
SHA-256: 5854cdebe7ee0968bea58468d313f69fedfb6d7b84bbd6cfe374f4dd364866be
font_02_sfnt_off0001212c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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