Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2f7ae7c00bdc50…

MALICIOUS

PDF

83.7 KB Created: 2021-07-21 08:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 14a7f8bd1c8babb7fdbbbe2e5415b98f SHA-1: dd3180901ea334f08d3b63c41ca38d757ce0006b SHA-256: 1d2f7ae7c00bdc50f17d608e64dd3c2d3de8bf2c85c8c112f4f15fb4c4cdd52c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs and the overall structure suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://securitydm.com/slicice/file/jezutozez.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/48qkelm55mmj74e32dhkjaej83/20341555748.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ekc5t0ur52rno75174qr7ppmep/23457407812.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/b5cc583c889282f1b706d3ce5eecb274/xumulanabatolumo.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087cf358e51c---xuteniru.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/43250469063.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/dizixugajamibupi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6b9e040d5e5e0a25ad17cd76652419dd/3593616798.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/08fb15ad4d7f255ede488d5283b2ec68/zubegugepimurowodu.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h9tr67ast1msrp1lj1beq8m15c/wuxawawojo.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/9674979338.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/85677273813.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/346741df2cfd3491210daa5d95f35120/wejejifaranixe.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099232b99c1b---guwopaperiwexukufa.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/24562032652.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rjvfga6uhamjrikqt6nhuiq5u8/50605135845.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fde38ef7b0---38801276247.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd1d247bed---xusowotuxegibuz.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/35tkclr1hpjanti6edh9r98ns2/wudetez.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/bodugowibuwimibot.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/23864096568.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/supivimagi.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pplomhc72vssha5on681f7pe05/88690427640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=escalated+quickly+meaningPDF 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_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 10928 bytes
SHA-256: 268f49b31ef3ff837d3c25dbcbfc2ed48a8422886b1be0d67171801c0729f422
font_02_sfnt_off00011101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11101 18496 bytes
SHA-256: e039821c755aeab2f9f02c8e5ca743d3491ed56e754ba6be55c957fff96d3eb9

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