Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b0e0924118b344…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 10:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b16b6bcd50131af66d0e27939d77f232 SHA-1: 5de6ed17dfb701d3675c46a09dc157bad417bf71 SHA-256: 60b0e0924118b3447ec0464036bbdc51622bbd7098bfc8e5e96d333d37cae7a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://webinaris.org/ckfinder/userfiles/publics/files/tugefazujuximoz.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/722cf2e4dcd32dcdba3da18e482e315e/66848551638.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc80265d8---towotilapexuduvirodalog.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840b89eb971---ziwowopojafudaludiraj.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/4ku6i1bgial5j1m9ataja177j2/popapozonepepigik.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ea3ccf29d4224344873ab1385310c715/65423135872.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnlkliq8k5pqlbaarvtnt879lj/nejinofu.pdf
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/svfccl0qa1sstq0o0121ppcf32/kejulovoxizedof.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/96c1729045a0a2ca87db9cdc7d3ba15e/davoxaligewafamepab.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6058ca73a---27862450257.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38fc52be5d---xotebuvexugitipovuwiz.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712f337b58a---vabenitunibojevolelepo.pdf
    • http://www.asslar.de/downloads/27996740589.pdf
    • http://jedwines.com/cmsCart//upload/file/kedefidatalexib.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4d1bd023b---lugesudadamafekisa.pdf
    • https://abugfreemind.com/userfiles/file/28935003024.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609175e5ec03d---6987644482.pdf
    • https://cambodiadriverservice.com/userfiles/file/80417941052.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160829dbd04402---sezidupotixulip.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vdk2gtuhqv4c6qm3v42nhhgs4h/pufimorubexiv.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/36b74c95400e83b5b7eeb41ed64ebe2d/nijixet.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/oqetg6mtakq9ebpaiqqeo02cc6/38147974583.pdf
    • http://sendedianqi.com/upload_fck/file/2021-6-11/20210611233411245308.pdf
    • https://luyenthitoeic.info/userfiles/file/xuzuzuratobatux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=snake+plant+growing+new+plant
    • 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_off0000ee6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 16792 bytes
font_01_sfnt_off00010681.bin
f0894c701a9f150a6d99ff66e4bcaa19e0519bd0944cb08d86ec9c471c79e109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 10512 bytes
font_02_sfnt_off00011e9c.bin
da7452bcfe535bbbb0cfc59b2a0f7ca37fa8f376635adb99fbf84d3f74b32e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9C 17132 bytes

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