Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fdf0dd40d0ba38…

MALICIOUS

PDF

118.7 KB Created: 2021-07-27 17:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 391a974d3231d4e5408d0dc35c9defed SHA-1: 5fb4cbbf13cebf2f9dc983b272347dfd00973c38 SHA-256: 86fdf0dd40d0ba38ef2ab09f7699a6aeb89c62316e713e8619d860826fc11deb
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links on compromised CMS upload storage suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://3e-machinery.ru/app/webroot/filesfiles/ziruzaradokomikakobixoj.pdf In PDF document text
    • http://stonestudio.pl/files/upload/file/54482239659.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210605045130.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce592826eb---36009008456.pdfIn PDF document text
    • http://innotack.com/userfiles/files/nomutenudow.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e8b7b226a---54920867833.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c88505785c4---40724389993.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/4bdc4750aa45d1cf6f8376ec31c9f489/bipokulevowawaboj.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14a896077---87275841426.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079367f41f51---gufuma.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072051ff0cac---siwawupopixavix.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/167e727830e0260059ecfdc3531cf683/65464542968.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073d933dbcfc---mibomumazelakuzipegevubi.pdfIn PDF document text
    • https://digireg.nz/upload/tilizazolibagerarufu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6e1a303b91a901e7f5cfd91f7c15922d/66546799948.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2143ec53---xaloranijigapit.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8dbc6346b---36760171732.pdfIn PDF document text
    • https://wagaskar.com/media/98349793165.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/banuvaxojolomadelu.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/gugusuziliveruturup.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/bakizi.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/66866207933.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/matomakafulozetewiweni.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/16584545968.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/96583395414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hoi4+kaiserreich+usa+civil+warPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E17 16220 bytes
SHA-256: 503dde4a75039b038586b0abe8b8c5526b106dc01e0a8c7227996e504d603754
font_02_sfnt_off000183ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183CE 18220 bytes
SHA-256: bd313489783c088ec1a1ff97a62b9570064a784e1e70122e0618d6e40a285729
font_03_sfnt_off0001b3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3E5 10536 bytes
SHA-256: 1168e0ed45afd160ea32969da06f3f44ac293dd78ec93fa3ea4083bb9f3ed3a1

Open this report in the interactive analyzer, or submit your own file for analysis.