Malicious PDF — malware analysis report

Static analysis result for SHA-256 485edde3a9da810e…

MALICIOUS

PDF

72.6 KB Created: 2021-09-15 12:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: da09dac04a0b5492da3324dd464c9383 SHA-1: f3b2bc54bc8244cf22b4b6981e3e2fee655bbb02 SHA-256: 485edde3a9da810e7e9c8289a89602659bcc8f9baf5972b530fcecd5e7b2a1a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=8+ball+pool+mod+unlimited+cash+and+coins PDF link annotation
    • http://dejede.com/userfiles/file/fimin.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xuliwerifupunujos.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/lufakarunixabebumuruwofe.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/ruvuxukofomosopasila.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/37349119666.pdfIn PDF document text
    • https://securitydm.net/slicice/file/78199667312.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/83350294597.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/42464693999.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/jarezev.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/13190656531.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/59919795686.pdfIn PDF document text
    • https://tadimtursu.com/image/files/51909047589.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/37490588814.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/zikivalanewigebutipalamu.pdfIn PDF document text
    • http://modero.vn/upload/files/58968367283.pdfIn PDF document text
    • http://rooptex.com/uploads/17553423047.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/fakama.pdfIn PDF document text
    • https://ratodua.com/contents/files/19701580527.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/demetone.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/zarimij.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/38813493450.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/vazimeledimutobo.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/gokuvipixo.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_off0000b486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB486 18016 bytes
SHA-256: f1cdb21e021004be532d4a46f65fa692b9295dc461bc5d37826b9efa9a50f8a4
font_01_sfnt_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 11032 bytes
SHA-256: f03795c804a461cb59321b89d33b3fbba4a01563421e7870f6ded05013db30c8

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