Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d4c4d6d4d466ac…

MALICIOUS

PDF

78.9 KB Created: 2021-03-13 20:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f59d9080fe92f30f3f4efaf97f9f70c SHA-1: d2fcbb7029985136d32efc9c8deec67ff11b3cfe SHA-256: f2d4c4d6d4d466ac764bbf09fe4d07a110334715f333790e7bd6a2e765ecb60d
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xubemukefanu.weebly.com/uploads/1/3/1/8/131857920/8985149.pdf.
  • 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://ponafet.ru/wix?keyword=watch+chef+online+uk PDF link annotation
    • https://xubemukefanu.weebly.com/uploads/1/3/1/8/131857920/8985149.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/4553334.pdfIn PDF document text
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/4d23cefeb.pdfIn PDF document text
    • https://vovamujif.weebly.com/uploads/1/3/5/3/135318660/zufetaw_jerelitil_matapalu.pdfIn PDF document text
    • https://molawakipo.weebly.com/uploads/1/3/1/3/131379716/1224867.pdfIn PDF document text
    • https://bufitalusiwe.weebly.com/uploads/1/3/2/6/132682607/8874263.pdfIn PDF document text
    • https://muxixeronazuxup.weebly.com/uploads/1/3/4/5/134508557/jegawegenalajarexa.pdfIn PDF document text
    • http://poroda.site/dxcpl_directx_11_emulator_download_wdvdyc.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/debiwogotipepuzani.pdfIn PDF document text
    • http://storeeu.info/lixojavokukidotipara6hzfe.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/dapuzi-bidikivusiru.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/rexusewuloviripunejome7f8ug.pdfIn PDF document text
    • https://vubinejenifa.weebly.com/uploads/1/3/4/4/134444695/3df71fc650.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/gixorinewav-wasigowujejanu-pojizolewar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e75f7bf-6859-49b4-b2e3-5ad3ef04db4a/ncaa_football_video_game_2021_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/noxetetasopokijumiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3f6d94-da95-4559-92ce-b423ad10c132/dolira.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/fireman_sam_cartoon_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33dfe952-3df0-4803-872d-85d49fafde1b/86405851016.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/bickerstaff_brainstem_encephalitis.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/modewata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1643c3f4-ef61-4f28-9a9e-195492e28353/the_exorcist_book_review.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 4772 bytes
SHA-256: ca038f50a8c1f747d47443371cc87e464ce8836a90cb9916f6b18a67b814fcc0
font_01_sfnt_off00010757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 11040 bytes
SHA-256: 6859adb904a073a59c8effd37e2176aa7298d8ded5af1d55777748b6ea9a3ac6