Malicious PDF — malware analysis report

Static analysis result for SHA-256 63be7118e9c0ee3e…

MALICIOUS

PDF

75.7 KB Created: 2021-05-11 21:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a4c09c1b90108afc54281df356846458 SHA-1: 7d04078983c0d901892e1ee5a2f8a849e45bff7d SHA-256: 63be7118e9c0ee3e742cb87a0e46b9f456409f6bc5d137513c592893b52478bd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure. No scripts were extracted, but the presence of external URIs and the overall heuristic profile point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=what+size+file+to+sharpen+poulan+chainsaw PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fe494858c692.pdfIn PDF document text
    • http://mabobuluka.iblogger.org/11780791215.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/xaxalerele.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/programa_aprendizajes_clave_quinto_grado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_6035b159a96fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_60328667cb7d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476590/normal_5ff680f6d85db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475204/normal_60672ae065008.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/03fd09b8-9ff8-432c-8a13-05d9ae3fee14/63014031612.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/kimegabuvojapepijobapiv.pdfIn PDF document text
    • http://saginufazefape.epizy.com/how_often_does_the_new_yorker_magazine_come_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1326451-f9d2-46a6-94f4-b0c4d31d5a35/corbusiers_five_points_of_architecture.pdfIn PDF document text
    • http://bijesinatepeli.epizy.com/the_admirable_crichton_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f115ed9b-e0c4-412f-9a51-6c417d0d0f4a/integration_by_inspection_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/roland_td6_drum_kit_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afc8767-c9f2-4835-a6df-dd2f1a36d437/who_makes_kobalt_portable_table_saw.pdfIn PDF document text
    • http://vusomafolu.rf.gd/desukozebafesowusorokoje.pdfIn PDF document text
    • http://jekurur.atwebpages.com/68832773685.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/96659295875.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/the_cat_in_the_hat_knows_a_lot_about_that_episodes_wiki.pdfIn PDF document text
    • http://zasexizo.rf.gd/resolve_f2_into_components_along_the_u_and_v_axes_and_determine_the_magnitudes_of_these_components.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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5260 bytes
SHA-256: f40088ca286fa5f7ef1ccc3c1d7ba1b533c704ea028c0ce409a28bf122ca550e
font_01_sfnt_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 11588 bytes
SHA-256: 78a3e4e4b20d0089f6d129dc0b332fabd9178c557aa368594d58e7505bd179d2