Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f62989d5577ece…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 22:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e6f3154206c67bd4bdd29cbfa76b3ee SHA-1: 09a03f73cec737ac61b3fe37e85d28f9b0a2815f SHA-256: e0f62989d5577ecee37be51fd0c1470f872c29b3d2195df4e99b9c4672299605
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm PDF, suggesting it's used to redirect users to potentially harmful content. The presence of numerous embedded URLs, many pointing to disposable domains, reinforces the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://agrobud.net/uploaded/file/44839353024.pdf In PDF document text
    • https://espiber.cl/images/uploadedimages/file/fugeruvisuloxagitaleb.pdfIn PDF document text
    • http://ore-processing.ru/d/files/javufanilezifudosanisujat.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/33070004362.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/rezopupusizepoko.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/pubufiwujijifapivaveri.pdfIn PDF document text
    • http://msiutilities.biz/documents/31596767382.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/tutodurejonovujuvoxusak.pdfIn PDF document text
    • http://akademibt.com/resimler/files/fimosumawopul.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090108595989.pdfIn PDF document text
    • http://hainfelderteich.at/busomukidojunaji.pdfIn PDF document text
    • http://hobbes-group.com/upload/files/55246233185.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/15266107939.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/59349499000.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/52290972160.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/sigexuriguvixumewuzikat.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613036caa22ac---7184900138.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/29496412808.pdfIn PDF document text
    • https://biocoils.com/img/file/31183164638.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/76232365268.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/5387999044.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/vejuledamigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gt+s5330+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_off0000d566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 10532 bytes
SHA-256: d77184a1f947d70f3a88ae27a307d3216e139c679dab202f2223ca973b9d9814
font_02_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 18392 bytes
SHA-256: 664dcd038933a8503550d8538612b7e8238dbf53354186152679e32eedbb5098

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