Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe0e30b07bb3f04…

MALICIOUS

PDF

72.3 KB Created: 2021-06-29 00:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7cd00be81194e94046290cad98c26f3 SHA-1: c2a435d14322121647520ea5863debcb748e4876 SHA-256: 3fe0e30b07bb3f047dfd48ec534a6e3b9969112516a2aea7d72c9d84ba5b5af3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://coretry.ru/uplcv?utm_term=complete+with+first+conditional
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755ff8eb57e---tipux.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/te45p7q1i1n8r7bcbok8en1n10/25490745095.pdf
    • http://unseenadventure.com/userfiles/file/30005995357.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a7769d665---pafezezemofatojalisoreto.pdf
    • http://www.nomorcantikspesial.com/file/47783314703.pdf
    • http://pantryscan.com/123cars/imagefck/file/96338367789.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/972b8b90b31c4cca43487e1a257c5a44/tugusurejil.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/123c61acab094ceaa0018fca54235197/37615806808.pdf
    • http://innotec-industrie.be/userfiles/file/62770318632.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c15a143c95c54eb71661f879bf07de3e/bakudavaza.pdf
    • http://jtour.vn/userfiles/file/59640128233.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d114a3712a---39392749711.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0607cdb4---28013594073.pdf
    • http://cephedanismani.com/images/pages/file/fafoluto.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfa6a1781---zokewidopoxovutatidekim.pdf
    • http://asijskepotraviny.cz/files/file/sobaxetapad.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/48310916250.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b643ed35cad---20911283359.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f535dd157c---88774830587.pdf
    • http://sklepjola.pl/userfiles/file/42374221261.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca035dcea6f---lezopuwove.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dad8c2406f---vefetixinewovusuvazi.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/47b7f122c1a8903cbee0ee79087ebc08/rawoluxewatevi.pdf
    • http://maslatalaia.com/userfiles/file/39598882627.pdf
    • https://stdtekstil.com/upload/ckfinder/files/guxumetiruminulot.pdf
    • 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_off0000bcbe.bin
3d1f4e8f977bc251dfd689631de3a03a0b1e9d7e78372f3109d4a176bfcc28cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBE 11000 bytes
font_01_sfnt_off0000d628.bin
596e8b1f4171322ffe8202efbcd2776d6aacf3d5f31361cea50ce7747fff937d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD628 14992 bytes
font_02_sfnt_off0000fc10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 16792 bytes