Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae2e2a9d02204ff…

MALICIOUS

PDF

79.0 KB Created: 2021-03-11 03:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 84bf9bc92966e0b71162fc7e6f0c8a90 SHA-1: c82df0f32d55523311ae64f2f63367657696d602 SHA-256: 3ae2e2a9d02204ff41c107dade5a915c2dfc9aef570d467adb224edfd00423cf
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs pointing to suspicious domains, with one specifically designed to appear as a resource for 'business administration interview questions and answers pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/award?keyword=business+administration+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446924/normal_5fd6e654dc14b.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/what_lights_should_be_on_my_arris_router.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/lozifikedomanisofox.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/spells_in_half_blood_prince.pdfIn PDF document text
    • http://zazonowipudu.66ghz.com/xifekimiwagijimukamexuz.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/nursing_theories_for_change.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393889/normal_5ffdc90fe7e74.pdfIn PDF document text
    • http://gimepar.22web.org/hospital_visitor_sign_in_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/galeruripeteforiwirex.pdfIn PDF document text
    • http://pimomazib.rf.gd/case_files_biochemistry_3rd_edition_free_download.pdfIn PDF document text
    • http://wubexemetaxoru.epizy.com/gujarati_barakhadi_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/debit_card_payment_template.pdfIn PDF document text
    • http://jabepujun.epizy.com/37750341776.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/49023600547.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/99285044170.pdfIn PDF document text
    • http://fenubamijub.epizy.com/java_mustache_template_string.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/soundcraft_ui24r_manual_cz.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_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 5484 bytes
SHA-256: ba68d66e7028dea5e744ac2c962e00ed0b225f93187260773ee0972fca7c402b
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 10088 bytes
SHA-256: dce48abf183f1917900112172bb5ebc5f0602e1adac55a0605525cc4fb91d4f6

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