Malicious PDF — malware analysis report

Static analysis result for SHA-256 633f26014a6416ec…

MALICIOUS

PDF

83.9 KB Created: 2021-09-08 02:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bcfb9776166d09be002c8f9ef5a20ec0 SHA-1: 3a23fab3ebef1974d7ee4d9f5edd0cf8067ac637 SHA-256: 633f26014a6416ec9ca73986f598e578526c9313cf050dde10cfdcd97f5510dc
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://moretonassets.net/userfiles/85268205402.pdf In PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7g782a801p93l9pcdakghm6ll2/1210539263.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608251d30c3e0---20003280227.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gcpbhed0cdllgm9c4ocunl7o15/pebaw.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/950028510ef533c84e94580c92aedc48/naxeloruzojelovenu.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ebcc24379---lowokozomobofavegapebuje.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/vopexomujuvodozo.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918d852c2ba---loberagijawajut.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4029eb891---govipo.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/zosuwetexezawikene.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c047cd1fa1d---6204223840.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/01589823d8de6fe1c507d8c5dbd5c66e/mogutapifij.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/66646060274.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202161624258.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/84082724694.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/litiwukeweradabuxura.pdfIn PDF document text
    • http://halaljones.com/uploads/files/pijidivofuzerawelivominif.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/93450611286.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pk01u0thlodmnpl4vf7ul3f067/tepikozutaxozumirasafomi.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/xipelobanositaro.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/f6649c1f0abf086597d690a324f11fe2/59531010089.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/dogebetubilitigakixuf.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/afbc1c168c71e84ab70ddb1b3a56d33a/goxanerupejuleromese.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q3vl89a40jk264mj40k9mrpuv5/nekasipemobuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=mortadelo+y+filemon+pdf+descargar+gratisPDF 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_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 11068 bytes
SHA-256: 3e1ca554bcea1f7723903916e9f6752909d16529f8408e6692328f280fba55b2
font_02_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 19308 bytes
SHA-256: f81103b68a5c3e2b063fe4c4f04dc6f822b16801dd29294d25920e5ad886ba27

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