Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66772b7a231a5e6…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 01:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b2f85ed83e46b377125b474d0ee4448 SHA-1: cf2cff30c37cba60bfe0b2a3d3eeff2cf07f8206 SHA-256: e66772b7a231a5e683fc6a3b847cc01fb2e18ec16dd794f8ab3eb078f4e0adb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dadf23e0cd---98687873858.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/e6218b650bd59608192fc01d38802358/febipuxevinobazeteze.pdfIn PDF document text
    • http://kurdumovldpr.ru/uploads/files/41438761352.pdfIn PDF document text
    • https://bataretak.com/img/files/file/35180358038.pdfIn PDF document text
    • http://greenbrier101.com/userimages/koboxederegobamodike.pdfIn PDF document text
    • http://chinazzjx.com/d/files/56068839723.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609157908e696---woxubujuveg.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/kesanufasijarakot.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161296b168d0ab---nodotegatakusak.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4ab48e41b---xevekadivilokofoninejomu.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/pulebixo.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/zatodativatagota.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0f8b1d4fb8c8603502a6220092cb602a/pafikisawudur.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021082512203530.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/54751859122.pdfIn PDF document text
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/40170709454.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/letotu.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/hcb39objgkdmbub1l78dq6j71j/56234169587.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/riganezugemoparemigaj.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/lavabafu.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/rufaz.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/kikaxufavulevumijax.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/30396666594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=succeed+in+ielts+general+6+practice+tests+pdfPDF 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_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 11020 bytes
SHA-256: 5c5cdf4a308746dece325052aa7d935231df82842da529980ba88edce5f4ba99
font_02_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 18084 bytes
SHA-256: fe0e8977572b60a5ad942d70880a246a65ef8f4106b2d98d226b089277dd517d

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