Malicious PDF — malware analysis report

Static analysis result for SHA-256 8945c30be6cbb66e…

MALICIOUS

PDF

85.4 KB Created: 2021-07-05 14:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e64720f7ada3061ddaf179115afec62f SHA-1: 10c23fe0fc4144d90a6ac63d299c341e21abfa54 SHA-256: 8945c30be6cbb66e99e8f4596867dc970c9cc31740c54e767d0455c2ae67b60f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or facilitate phishing. The presence of numerous distinct hosts and URLs suggests an effort to distribute malicious links widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607485484e6c2---97330261274.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89f4124e8---zakomiretuxomonawi.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/9l7lq4em8m3kaefidj17m0e1c7/19338545726.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/1e011333c578cc8846744f6521db3ab3/bilinetubixefogofetafoge.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d633720535---ronefozadokifegej.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/tajimefezowepedu.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/dea2de196b855dd35f22b36a77903d42/70283598235.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160806b79e197a---sorivatiruzabojivif.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/31961315137.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/uc3n7mrudb4qv4cim8pogkpdar/79537276535.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/9b68bbe6078448b44fc284a5de165e60/jolagitoluguj.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/wirif.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/883f81cd887eae74e951d00382947fa1/56650994749.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/05d956a90cbbbbb72ea5098c9b12c1b0/26311531067.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eff740b766fd57f3b5d6fcaae1c61a63/56904153555.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/17197345238.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/od2oinarpcvm05kh1hs6pcq3l1/30813241509.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90a701f561---67784640796.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c96fd01a78a716d0c7a2d689d2b5908d/xakoragagokawifox.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/c6q4gnjb1qahbt65g8phmbl99t/gipewabufivuzebopigez.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b28361c75---retotijabivilipaxomobege.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f9594440408eb32cffe0afecb8827766/82654279432.pdfIn PDF document text
    • http://aps-mes.com/files/file/resodixuwofi.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ad4edcff1---97293141607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=when+breath+becomes+air+pdf+online+freePDF 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_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE17 18608 bytes
SHA-256: b52c0f100f0c6c0c1024850d73f00dd20270cca820259b5bd8889557c6926793
font_02_sfnt_off00012ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC0 11016 bytes
SHA-256: 8f678f4fad33f4f6bdb80a03c286910cb8ee090e774dc429f95591cdd7164a96

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