Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecec26714a84a93d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-13 05:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0300247672701acadea033411e30e60f SHA-1: 66651bfbb2757efb49915f72d5f966f1e904d1b5 SHA-256: ecec26714a84a93d8c728796efebcddb3d32ae252ca869971339d9afbbc815ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be disposable or used for link farming. The presence of external URIs and the classification as a phishing trojan suggest the intent is to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=20+free+instagram+likes+trial+instantly
    • http://sushrutproctology.org/ckfinder/userfiles/files/gimodipudogumipot.pdf
    • http://baocaosuhoatoc.com/luutru/files/ripugizulebipujagavuwos.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/gilerekatatowagumeje.pdf
    • http://softtox.com/new/userfiles/file/sifumenisixeponixiw.pdf
    • https://gberwanda.com/gbe/useruploads/blogs/files/kuvojofinigarazabaworipo.pdf
    • http://globalfeedindustry.com/upload/files/41932976346.pdf
    • http://vln.nl/files/file/duvix.pdf
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/wetiwagowavozovufe.pdf
    • https://t2sc.me/userfiles/54333340399.pdf
    • https://cevhertemizlik.com/userfiles/files/38690917072.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/fivugetesurateleladofat.pdf
    • https://siroyensao.com/upload/files/27826061475.pdf
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/gajodapuju.pdf
    • https://parkettworld.com/upload/files/zexexasipajuz.pdf
    • https://benqmusicworkshop.com/fupload/file/dafizopodoxebesi.pdf
    • https://taperagi.com/contents/files/44307511121.pdf
    • http://gld-lining.com/user_img/files/libaxi.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b22ad75dd6---zubesabewirenigokepomud.pdf
    • https://malinaionescu.ro/userfiles/file/68144211749.pdf
    • http://modamoda.nl/uploads/pic_lib/file/1406600135.pdf
    • http://kimkhimientrung.com/uploads/image/files/23070613712.pdf
    • http://andreuma.madteam.net/ckfinder/userfiles/files/wepabezoniwede.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 16792 bytes
font_01_sfnt_off0000f98e.bin
47f362e136c3e7fb9709d476da9436e5f7a8e3cdd98b25cfb561df6e22069e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 17932 bytes
font_02_sfnt_off00012844.bin
9e4d0beab83728e799c8c24bc8c41545d23c2c5f7d75fcafe1850a5398e21375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12844 10788 bytes

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