Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e47769c18f692f9…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 02:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 042c52ce707b09000ae03d8ad7495540 SHA-1: 4973336860fd6fc36aaccab6cb3925a1e1657b9c SHA-256: 5e47769c18f692f9dd5c656216f482087272ab935483dc5ad3b8862b46c61a39
246 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed for SEO manipulation or phishing. The critical heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically identifies an attempt to impersonate Outlook and use a redirector URL, strongly suggesting a credential phishing campaign. No scripts were extracted, but the PDF structure and URL analysis are sufficient to determine the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/c040d.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/strik?utm_term=how+do+i+check+my+prevailing+wage+determination+status PDF link annotation
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/c040d.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/ehcigib/gamefly_customer_service_hours.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/lozejam_mowotogazug_vusibupupix_valeliw.pdfIn PDF document text
    • http://fobukig.iblogger.org/the_three_stigmata_of_palmer_eldritch_epub.pdfIn PDF document text
    • https://tajifajedu.weebly.com/uploads/1/3/1/6/131637014/kaxud.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/Kif0Pib/52183190964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_6012564bb24db.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/eomjfig/ribolijivudisiwar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_6030190aede7b.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/koduvedoramavituzimuz.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/tofazade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc73477752f5.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/92790808494.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/wreqjh7/52089543830.pdfIn PDF document text
    • https://tavovoxiwazufaj.weebly.com/uploads/1/3/5/3/135325502/tepapebemisefopiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_6019ae73cc5dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_78633744fdba4585a885e77723bfc21e.pdf?index=trueIn PDF document text
    • http://pepojugatidi.epizy.com/alexis_de_tocqueville_biography.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_5830b5fde00f4c99aee4fd946dd6743b.pdf?index=trueIn PDF document text
    • http://vekamodadon.onlinewebshop.net/arihant_computer_awareness_book_free_download_in_english.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/dream_a_little_dream_of_me_guitar_tab.pdfIn PDF document text
    • http://taximupije.epizy.com/vaikom_muhammad_basheer_balyakalasakhi.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_c1376641c23d48079ae0fd714f2db13e.pdf?index=trueIn PDF document text
    • http://fegifujeviba.epizy.com/zukax.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_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 5768 bytes
SHA-256: ca5b5c2107d1d5c22669e5ddf775a6b41717a6827c73580fc76e10152bcce280
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 10892 bytes
SHA-256: cfd25da61a3a20b86bfc5a93e9c4980e3249fa26824158067bc6bb257f359421