Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c07e9472458be2…

MALICIOUS

PDF

83.2 KB Created: 2021-09-11 15:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf28e352395c64e1c2775d0ccbb2a43c SHA-1: 9249d82d9c55ec2f9770383c138ceed7d4675af5 SHA-256: 77c07e9472458be2fcab2658306957f3b6ea1fe08b5c2bf7d3bf9ab1b17f8f4d
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. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or credential harvesting campaign. The PDF structure and embedded links are characteristic of a link farm used to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=watch+the+craft+legacy+online+free
    • http://www.contectrade.hu/fckfiles/file/20441245927.pdf
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/89212937752.pdf
    • https://bravo-hk.com/userfiles/file/67194635555.pdf
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903224437.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/47509012229.pdf
    • http://xn--80aa5alfu.kz/file/rudud.pdf
    • http://rulife.ru/ckfinder/userfiles/files/52107760623.pdf
    • https://ciela13.leaddeehub.com/userfiles/files/zuvoripotinesedapebu.pdf
    • https://mygrind.ie/userfiles/file/kemewara.pdf
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/24663529611.pdf
    • http://dragonspond.com/uploads/files/31265894208.pdf
    • https://fultoys.com/userfiles/66117571088.pdf
    • https://deniz-sogutma.org/img/userfiles/file/36172709396.pdf
    • http://nigerseedindia.com/uploads/lumepewobogopigumovanuwaj.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bb87a5ec9---kimevedebax.pdf
    • http://ohxto.com/uploaded_files/userfiles/files/57988899965.pdf
    • http://buydecor.ru/uploads/files/boxuva.pdf
    • http://idealthailand.com/file_media/file_image/file/nubabex.pdf
    • https://sambelteri.com/contents/files/74080871084.pdf
    • http://maremio.ru/admin/ckfinder/userfiles/files/kazutiwivodagupapikedub.pdf
    • https://at1-turbo-j3t.com/contents/files/27627458948.pdf
    • https://grdr.org/paidel/ckfinder/userfiles/files/xeviwidologedokuru.pdf
    • http://agierresrl.it/userfiles/files/doxabisesirakudireredavoz.pdf
    • http://hanabi-la.com/uploads/files/xanofopuwonamuzadamilugo.pdf
    • http://auto4-spb.ru/public/images/ckfinder/files/gatibenuseduvamosavuna.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_off0000dd25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 16792 bytes
font_01_sfnt_off0000f53c.bin
81d5a64eb2908ca5f05791a66178027640bd9356d0cfa5c2da810c3c138fc935		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 10556 bytes
font_02_sfnt_off00010d4a.bin
bacdf981004daeccea35cde6a774f0dc473cc7f119c77fd767b4299c418bf1cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 19072 bytes

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