Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b52babe4d027dc…

MALICIOUS

PDF

86.8 KB Created: 2021-09-05 09:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 632d0f00993bb03441bb1027d406e91b SHA-1: a06acda1502b5d0158435abd2381b1bedf42103b SHA-256: 56b52babe4d027dc17b3e3dd47131ce6c7bf3870ff724ec3d7fc89d56e275be2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf67dbee04c---90248773738.pdf In PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/fawulubatiwevaboli.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098647fdc8d1---43926275540.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec23c2b51c---43967352424.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/81298796359.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d688c7787d---gigebiwodetopamugej.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0b46db41---sexumowewidukupejisew.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/75979238573.pdfIn PDF document text
    • http://odumakus.com/uploads/files/47710978386.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/wibopidura.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e292a34e77---numawunuviwuligi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/penomovikulen.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f34a90b234a---70444466315.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9ae7ad4f5a54b36f1ecccdd37927a099/6759993581.pdfIn PDF document text
    • http://citra.cl/userfiles/file/93283482828.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/nikomudigelod.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608349fb690d1---dubad.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/konuvalexexelilokosowina.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/13995225520.pdfIn PDF document text
    • http://grandchainfamilyfoundation.com/clients/85333/File/jirorufebuluxipexovewal.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/lowodadi.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/vinuz.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/d1kg6ec0mkua985t04d3smr3ae/61932246849.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121a9b594888---80615268841.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/30494108228.pdfIn PDF document text
    • http://coumert.com/images/file/zodetabitorovunufaveveva.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/8f41c36166414bafd16fb1c734b92ddf/dozekelovaxejezosez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lava-lou%C3%A7as+brastemp+ative+blf08+8+servi%C3%A7os+manualPDF 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_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 20484 bytes
SHA-256: a75d4f6dfdc85456ec3671929a95ae266fcdf15db8fe51b8308df5d87bc41e26
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 11344 bytes
SHA-256: 6cd94b84832f68d27a24778065edf2ef2db3d280643f8be0a0017c2f9464a293