Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4074a7bc62b1f1…

MALICIOUS

PDF

68.3 KB Created: 2021-09-25 21:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f9881ee0a959a9b3db1fb3ce52e40fc SHA-1: 40d71fa60531e98795e46d0220b82dccf364d8bd SHA-256: 0f4074a7bc62b1f12af7d9d1811ca82ce9cb459c551a052bb342c2219a262248
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document with a clickable action, designed to trick users. The numerous embedded URLs suggest it functions as a link farm, likely directing users to malicious sites or further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://produse-zilan.ro/files/nesaliropuso.pdf In PDF document text
    • https://noelex22.org/userfiles/file/65835330044.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/34507907496.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/45145916388.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/76471910447.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/nimowowo.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/wifomokipesi.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/tuxasuxasoz.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/lolukosatudedez.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/lodoveravujulaganuf.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/mavasolomodo.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/22702958450.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/vixujofodejowon.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/nubigumozabapoto.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/lokujisozusoderafer.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/15292786990.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/62347478981.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/fajutuzalon.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/mikorawovewaj.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/tokipukavegeg.pdfIn PDF document text
    • http://generoussecurity.com/uploads/funupadogakofulelolifaj.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/dojidipekokotime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=immortals+apk+downloadPDF 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_off0000b059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86B 14292 bytes
SHA-256: fa500254aaf2b0c57a577c044be4b028f5dfd935fa2b99d129ad93ffb10fdb0a
font_02_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 10456 bytes
SHA-256: 27316d005a885006d3aa9a98400edb68f9998f6f8b58d9429a206fc695a526e9

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