Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea67bc01cf6d2c8…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 21:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 899a64ec20ee35b2e5d3f078ceefc25d SHA-1: bd87363c7a50e4725941c8d9f7b7eae52522a5bc SHA-256: dea67bc01cf6d2c80e69640f3e00136ba0f69c4331b153f2865e1974ba8682cc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, with numerous URLs pointing to potentially malicious content. The presence of multiple external URIs and compromised CMS upload links suggests a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/35c0cc2022e60b2e011767d11541bfdf/tirob.pdf In PDF document text
    • https://tecnicadovolante.com/images/file/84349489731.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/tatep.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc96407acf---54906196804.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/95629793914.pdfIn PDF document text
    • http://napiarsaigh.com/images/niletumazet.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb68bb2ef5---fuzazajebasozixozurusi.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/15990978700.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/83213862085.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/cd12e7c8be9f125fa0d20de649f8de2d/sipuboxinodesomo.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/kls5phf0k87o5mojo81l01snd7/13030094005.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48868187525.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/sanadeforezujitagukijarav.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/33561551957.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/zominul.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/6024138151.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/1gd7cj58frfnp42e4428t8et82/nopolaxo.pdfIn PDF document text
    • http://mcutech.net/upload/2021/07/file/1627574441170774312.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/top8cqkv3ehcufdhkiast3eo95/76477417868.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/dojebuzosetowaxifi.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/pefukitivanadefetagiga.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ec439b06d601d55ce410f6e9cb751bea/73057812466.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/64638380254.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/c534c4d6304256f964e4eddec961e636/debedebolinewupegaf.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ad5f5c8ac1d103b9673e4857548690c1/gikulewuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=genetic+mutation+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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 17096 bytes
SHA-256: e8908b7587989fd8ba0db9e8dbd42ba143a365196cc8390a28dee3e709944b3e
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 10604 bytes
SHA-256: 7fc45da5ece8115d75b7a0d6ddee3df93c65524ec230ee3490acaa473c37a2ed
font_02_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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