Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd693ccc42efd5a7…

MALICIOUS

PDF

91.4 KB Created: 2021-09-16 10:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a908834bb61ac7b13ee3c11c26eac7a6 SHA-1: ce3b02f03238d81c1f701b2f14edcab4ef92a90e SHA-256: dd693ccc42efd5a7919d26c6f6bf861449b265b12fd77a56dfcdd9185cfb8369
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are part of a link farm pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=best+mobiles+under+25000+in+pakistan+2019 PDF link annotation
    • https://webshopplus.nl/app/webroot/files/userfiles/files/wigobefodivagoxurikub.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/91269251007.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e22375b28---2445731148.pdfIn PDF document text
    • https://sanagustin.cl/files/mivatiwavekanetevirof.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/8348466569.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/todupatugagovekirefukifen.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/rawesadusokidosata.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/fukaroratibaduturo.pdfIn PDF document text
    • https://anup.bo/images/files/fuxaxakevunixinesazusaj.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/27486051922.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/dezujofimazezej.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/39702196158.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/69585786066.pdfIn PDF document text
    • http://progetec.org/userfiles/files/fovasigesojeviganim.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/linizatuwedaza.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/86548589109.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/karifosugewinorinixe.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/toxovivep.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138f8aba5ecf---40663742161.pdfIn PDF document text
    • http://handgun.ee/media/file/semozatofimiloro.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/mufafugilobojapipozav.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/75446730409.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/42875929163.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161342fb749dec---68473676493.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_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 11532 bytes
SHA-256: 733e73a98da42a136b3ca17b78720794cea65b808c03c3758beb7d03bf6c4373
font_01_sfnt_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 18360 bytes
SHA-256: b0d2660a51c2b9e6af8d3dfc9659378c5d289a347f8fe5d4c60719a4f2d89b6e
font_02_sfnt_off000147a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1