Malicious PDF — malware analysis report

Static analysis result for SHA-256 925a0db521a30e01…

MALICIOUS

PDF

76.2 KB Created: 2021-06-25 20:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 186d00323fd06c0c9b1b07e329779e43 SHA-1: 36351346fd1315c829de583f64de7d394db57a6f SHA-256: 925a0db521a30e01ae68727de720118edfdcc57bede7374823747f4891cab3cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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 http://mldinsaat.com/image/files/wetoluzojifovixe.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e7e8b1d15---49406455076.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/vjqd21t78ncj5tgrvpm2p03a4h/sodojom.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf0ac3cdb---97408403764.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25502c770a---84117830963.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/4fddfe2824a596840485c652d0298c0b/gozapaleripobisubatuza.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd32a3bf8b---53811992474.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/kb40827493utaqt88rva1ojrin/68414623585.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42b153b67---92037994359.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160833496d9139---52648186544.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/27511059310.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/5qa3la9pick4rea01f7i6drmvp/gosemawuzomerexoku.pdf
    • http://adria-ex.com/images/blog//file/zoguruwunawikojexol.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f699f4f451---gigudejorup.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/cod2jkn8g4kmceo2hi3g02gvi1/rotuxaxiwabulezewawubakik.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2880bcd02---xexuxilamikobesaten.pdf
    • http://10glazsikeyrosa.ru/file/majivunagujababufigupum.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/o2n18rba2o19s0mcm3ptvfjai9/gifaxikipolenegegojej.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49e9cbe152---nogiwexakulamet.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/eddbb3d8560af8e7e3edba5067396d42/4831209408.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/c1a30d042ac3fa9d41e334f525937023/kufamuwejoxajurodimelozib.pdf
    • http://blessingsngo.in/userfiles/files/vewabafonumamidojusivex.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098599ef0106---jidiwutenob.pdf
    • http://alemotta.com/resources/original/file/jesevibafufewofigel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=manual+of+guitar+technology
    • 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_off0000c8c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C9 16792 bytes
font_01_sfnt_off0000e0db.bin
72ca90ca4ad1f3c3e7c6dd3b99df2b0e18b0091aa2d20a7a46bb1850536108bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 16380 bytes
font_02_sfnt_off00010b9b.bin
cfa258a0bb5d0a8da0c51a76b5a8e74b0c2fc5acb481faa601ae8cfb45b5ff08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 10652 bytes

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