Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e48ba99570ef38…

MALICIOUS

PDF

77.9 KB Created: 2021-10-08 03:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0b729a90dd2d79266221d8c1c4f96a48 SHA-1: efdfe82c67ae2ddd44617fbf879ab4453ebe6ab9 SHA-256: 60e48ba99570ef3842ae3de4e55927d9c549f942ff49572d64e6a05b016ed3c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://biserica-izvorul-tamaduirii.ro/files/mosigozutobobuzekezido.pdf In PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/patositowukuzizito.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/88729643098.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/rumifokomebomuso.pdfIn PDF document text
    • http://guitarenko.fr/img/files/34199180162.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/53539396595.pdfIn PDF document text
    • https://mahae.hu/files/files/vodejaloxizumono.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/3613669421.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/gupitedasitesex.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/fiwifaninigirojodikinimef.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/57927306956.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/lajaxuxabo.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/nobezale.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/zufelaximop.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/losadogini.pdfIn PDF document text
    • http://wohingltd.com/userfiles/6741499496.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/mekosi.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/43444807383.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/tilexamu.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/58358257137.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/81519705619.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/6928484894.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/jupavuzenapimodubilubepef.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/gusunos.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/xegiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=conceptual+design+with+er+modelPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/34468452162.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_off0000c7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D4 11180 bytes
SHA-256: f81920f5e4300b3bdb2e6a7a4d9cb16af21c6e550adfae5d3e0655df40f766b8
font_01_sfnt_off0000e19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 18476 bytes
SHA-256: 8ed54da2ddb27f2de0ce82da024e5780102d72f60572082978e426933ba7adc0
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1