Malicious PDF — malware analysis report

Static analysis result for SHA-256 969bbc8fbcee37df…

MALICIOUS

PDF

87.1 KB Created: 2021-06-26 10:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f04ce6cc073b7ee3b40b66d194f68b39 SHA-1: 129e7353604eedaca6e29b14ef9d14c1788bc3e7 SHA-256: 969bbc8fbcee37df2bfc1893859150354595921b233f13ec329a395b6ee04524
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=difference+between+permanent+tissue+and+meristematic+tissue
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d285mkc45a9elrmm0kmij2qpi2/pazifazawamiguseni.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a552fcdd---pasanunaveluvap.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607236749169f---danepidolitirexi.pdf
    • http://maychamsocda.vn/images/userfiles/file/puverimes.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607955eb5d62e---zezokavoxur.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28747181---kefanaxo.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c0939dd76db93ff100969d4daaa51eae/12261047635.pdf
    • http://cc-loges.com/uploads/file/foxakik.pdf
    • https://anakmeong.com/contents//files/78864754159.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6564aa732---16138913073.pdf
    • http://hopkins1983.com/clients/861771/File/80569119304.pdf
    • https://burgas-remonti.com/userfiles/file/9928595080.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16085a84e17b3f---46843505095.pdf
    • http://thuephotocopytaihanoi.com/upload/files/46310673649.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4ea71a44---xibawada.pdf
    • http://agiusfuneraldirectors.com/files/file/61746621387.pdf
    • http://protok.pro/upload/files/lebikovunewigojuson.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/9a93cb9335f6187986a7a71847695392/sipokixojorepibelor.pdf
    • http://falerisztika.hu/tmp/bivetedasupugo.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa251f89043---89114523178.pdf
    • http://17njl.com/userfiles/files/fuzovagosigibukuju.pdf
    • http://z-i-f.ru/userfiles/file/biduzubomidami.pdf
    • http://www.contectrade.hu/fckfiles/file/30790511739.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_off0000f20a.bin
2815771075ea2cddf86378b8585ce1982b7646aa09e0f904e6f1547c878ef565
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 10944 bytes
font_01_sfnt_off00010b43.bin
8bdad750772ee7e76ddd18d636d2c2a3909468524f962d152a1c7d620af54ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 16652 bytes
font_02_sfnt_off000136a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136A8 16792 bytes