Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3000f953c4740e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 19:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfc6177a176f844e5fc7616520cddcb2 SHA-1: a3125bb512fbf0a2d27571eb7494c9eca9fcbba8 SHA-256: 7d3000f953c4740e558105601e008a82d95d157bd9187aafafdcac748b3681fa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://philabc.ru/uplcv?utm_term=how+to+write+chinese+characters+on+android
    • https://masihpt2.com/contents/files/429651752.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1f2ae83bc---najovamo.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f021d39394---sebiwapuwedirewodut.pdf
    • https://kaunas.cvzona.lt/resources/img/files/53596186911.pdf
    • http://iact2001.com/userData/board/file/89905863084.pdf
    • http://111-orte.com/testarea/cwsCMSlight/media/files/22691360902.pdf
    • http://mutitar.com/user_img/files/nujoxemuz.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/zexoxiwitogili.pdf
    • http://highgaincomposites.com/img/file/20219140111.pdf
    • https://pmeds.us/userfiles/file/sopijifikejako.pdf
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/ribubasenaribumijivi.pdf
    • http://nova-auto.com/upload/wikebozajulo.pdf
    • http://artkulinaria.pl/sites/default/files/file/nakex.pdf
    • http://ranchobg.com/img/file/sufenefa.pdf
    • http://miskolciharsona.hu/pictures/file/20990006743.pdf
    • http://ventexevent.se/uploads/file/83342939937.pdf
    • http://ajivikafinance.com/userfiles/file/77775374447.pdf
    • http://border-collie.ru/sites/default/files/file/jiberomov.pdf
    • http://perles-del-beya.com/userfiles/file/29460321309.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614013744d225---sovamutije.pdf
    • http://mlight.cz/archiv/file/9756348567.pdf
    • http://bebsulmare.com/userfiles/files/gorelimufogigabowugas.pdf
    • https://easyown.ddproperty.com/datas/files/jopubuwod.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_off0000d573.bin
d11178ecff4a9f681639042f2f1ad72e9a82119bb80cb966a8fea14a47c6164a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD573 10496 bytes
font_01_sfnt_off0000ed51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 16792 bytes
font_02_sfnt_off00010563.bin
c6d182d514609984bf6d490fec8b3dbac518695c49e4e9d47e27086fc8416004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 20400 bytes

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