Malicious PDF — malware analysis report

Static analysis result for SHA-256 364c5165ba7ebb4c…

MALICIOUS

PDF

93.6 KB Created: 2021-09-03 14:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3c003e18cc18d2a7e3394159bbdc3a1b SHA-1: c08ac51c60f3327933be9bf173c7b976086a8d26 SHA-256: 364c5165ba7ebb4c72402f3d8b17e7825f3c8c734c92c35eca07269bcda452f8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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 http://bannermaul.com/userData/board/file/ninosexekibixo.pdf In PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160757c3e3169c---vamesiwadonalof.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/wedufejep.pdfIn PDF document text
    • http://sro52.ru/uploads/files/visukojutaxas.pdfIn PDF document text
    • http://modern-pro.ru/files/file/nonerofepexifekozegizofe.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/12662938241.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/fapubemokonalavujoju.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/5ba6b2d78340739e1e9e0366119d0805/rogavupokinodago.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/ziwefidirimapebipus.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610079dd7531a---gupibonamujasajexet.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/pibizile.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d5b31e2e---tupixiwonakukafulajaji.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210722172939_b8pfp8.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210714032919.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4c9380ff95f6e3e01b80038446715f84/15928122452.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e1a39846---27880110605.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/rivajosejanu.pdfIn PDF document text
    • http://kaies.cn/upfiles/21062100482350581175fxd7.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/89188676547.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae34b3c989---gudosuwon.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/82689407604.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/d9m0bm5mg2ib5cb7ce51hmhsf0/46228499230.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210805_DDDB6EFE45917061.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e440c72b87---65535830128.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/tumosa.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/3rlu54augc4jeb2fnoeobo33rd/97726395531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=attribution+theory+in+social+psychology+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 11232 bytes
SHA-256: ce9b7d38190486ae0f718954661f9a8bbce0a708eec16ff26b742ea2cff946f0
font_01_sfnt_off000121f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F5 17856 bytes
SHA-256: 60fc50f84ea7160072802f19fa28522540e3eee136d93dabc164ce939f77a35f
font_02_sfnt_off0001502c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1502C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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