Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa6a26fa1de8b9…

MALICIOUS

PDF

93.9 KB Created: 2021-03-01 02:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 777490c562610ba19d2056dcb46437c2 SHA-1: e160b5af0901384eab745d01629b03bbb0e122ee SHA-256: adaa6a26fa1de8b9737da85a0c73f59fb53124539177b5ece365fc6ca113000d
186 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. 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 0.9993

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
  • 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.
  • 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://botokaw.ru/strik?utm_term=what+are+the+six+ethical+principles+of+nursing PDF link annotation
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/2f65b78913b.pdfIn PDF document text
    • http://zaroramo.22web.org/dividing_fractions_fun_worksheet.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/international_finance_management_mcq.pdfIn PDF document text
    • https://ponawexem.weebly.com/uploads/1/3/2/7/132740185/joremagareli_vurewaxelep_musurixeri_rurureg.pdfIn PDF document text
    • https://jigudubexafodi.weebly.com/uploads/1/3/0/7/130738940/16ade9.pdfIn PDF document text
    • http://barberking.best/logitofegunenilosuwijofutxq9xh.pdfIn PDF document text
    • http://ujjjrrrrr.space/dias_festivos_en_enero_2020bwg81.pdfIn PDF document text
    • http://ramosek.iblogger.org/83269457754.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/perinubivamelaja.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/230e9.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/wordly_wise_3000_book_10_lesson_2_answers.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/arcelik_washing_machine_error_codes.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/60410975288.pdfIn PDF document text
    • https://kuwujuzavasikit.weebly.com/uploads/1/3/5/9/135985591/674be000cf370.pdfIn PDF document text
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/dirasetodiminej-tigozusosekebo-sirizejefo-gusati.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/jitovorilovozavetimokep.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/7767208.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/2a4442136a5.pdfIn PDF document text
    • http://specialsale.info/60461142482p0qij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexovivuvere.myartsonline.com/how_to_be_a_team_leader_book.pdfIn PDF document text
    • http://bufiziwo.rf.gd/66821460822.pdfIn PDF document text
    • http://daparetefofan.epizy.com/namiwa.pdfIn PDF document text
    • http://metoduzudo.rf.gd/tivebaxakawifomekilulef.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_off00013311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13311 5360 bytes
SHA-256: 98e1b13cfb19b9d56c2d1f2123788fe45517d91b12fe344af5802e33eab42909
font_01_sfnt_off0001455c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455C 10548 bytes
SHA-256: 42e1aa48152fd2855bf9530a41f32133724b67e890975db817d8b95ee77781c3