Malicious PDF — malware analysis report

Static analysis result for SHA-256 afda11045caf0fb2…

MALICIOUS

PDF

90.3 KB Created: 2021-07-10 12:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 044bca2c7a389fd86ce689fc55211b81 SHA-1: 8bcc01b7c21307bcb56ad247a7f013d2502e5610 SHA-256: afda11045caf0fb28bc98e51260510c7a658cb2cbb1d39c886fd007c9b3555fa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.cenlaenvironmental.com/siteuploads/editorimg/file/visimik.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/qinrt36mbuunksi7kueqj64v53/pifolexobelux.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf57b26523---93802703751.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607573cfefcef---datikilabumi.pdf
    • https://balaji-technology.com/userfiles/file/tugekema.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b9b6730bcf06cbe0f661b4e20f64d7ff/tanuwaligiwuvivasezoxul.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c0ad65e1e---nesokakiravugirefefoze.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609210a8b1125---lovow.pdf
    • http://montaze.org/democms/userfiles/file/66401386343.pdf
    • http://ahkjt.com/upfile/file/42798014767.pdf
    • http://candientushinko.com/images/file/95564173669.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607939a715149---jixalabo.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b48a26f25---23672655536.pdf
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/65388656876.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aacea9dd392---fabulinizeretiwokidadovub.pdf
    • http://dolphinegypt.net/userfiles/file/lisebelupu.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/cdeker9jn7t65e8thhiapccuat/voferal.pdf
    • http://autosoftware.company/autoresponders_images/files/tuxefizaxovewizururu.pdf
    • https://alatheir.com/atheirwsfiles/file/6957591064.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/383915cfb0eb02f71ba0bbb8bfb9b433/62556134615.pdf
    • https://samngaimarble.com/html_upload/file/kenezuruduvibovu.pdf
    • https://airshow-bg.com/file/wapanejisakudifitumi.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/3e189232cdb7a65d53a6933649b4cd6f/59618335434.pdf
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/valutov.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/2916ad3b52dba151779155c7212d4b61/28757971849.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+annealing+in+metallurgy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 16792 bytes
font_01_sfnt_off0001159c.bin
2848e6deced621fac79dbd09b195a06f2ed045a9ea7afb6ce70e51fdba8245f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1159C 17696 bytes
font_02_sfnt_off000143ed.bin
cddb874c575ef6c5bcd8d42a40836a52f24810e40346c7eab21118c62327ed35
pdf-font-stream PDF embedded font (sfnt) at offset 0x143ED 10644 bytes