Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bebf12f58756b5d…

MALICIOUS

PDF

71.4 KB Created: 2021-03-06 04:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 01bf3dccccba220c7f07edbd6707f217 SHA-1: 179c38afcf1b54f5846d460ad4ddea3712e8acf2 SHA-256: 4bebf12f58756b5d025a1e7362ada88cf344bca9c73fe8abc59f4ff1383e2870
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically referencing 'adobe for mac free trial' and pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=adobe+for+mac+free+trial PDF link annotation
    • http://coins24h.com/keppel_corp_annual_report_2014wwlnb.pdfIn PDF document text
    • http://apparentlyopt.com/totawazirogokizasiusxxr.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/ib9HmtY/fluid_simulation_hydraulic_software_free_download.pdfIn PDF document text
    • http://techanomic.com/ford_mustang_gt_2018_price_usedrgf0r.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/biaMgS6/62933503370.pdfIn PDF document text
    • http://pusosokus.iblogger.org/cancun_spring_break_2019_performers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzekusopowe.epizy.com/free_powerpoint_templates_business_reports.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_2011ccef01c54b1d8ea22719d611acb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutisigila/29701248017.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/budget_2019-_20_summary.pdfIn PDF document text
    • http://tupudenijusab.rf.gd/96029417149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2e5eb4-ffb3-4900-9549-92752d34a583/dumisuxojanowemibojaxub.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/alphabet_tracing_practice_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5afd97-837e-4cf4-99cf-0399c0438aa3/79867088728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e355a264-671d-4966-afc6-6bfdf37dc156/50837960648.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_c9a732d7b4464cfeb738d8a85c10d0c2.pdf?index=trueIn PDF document text
    • http://zapavuvezozetet.epizy.com/bosch_router_edge_guide_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54d31a5-78fd-444e-894d-57afd12c5d17/53609242634.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_e470f3f67d9e4f0a9a036fa113fa3196.pdf?index=trueIn 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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 5120 bytes
SHA-256: 8078b0e9786591cc015d52845c8a7f67b581a4522f79d013d39d61a575d08d96
font_01_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 10208 bytes
SHA-256: a6feb5dc8d4db793d21c3771739fa47f22eed1f62ae8acfb3c77e70011e28b61

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