Malicious PDF — malware analysis report

Static analysis result for SHA-256 a543b8362b84ef2a…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 15:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4b0c04a14d003ee0c367a642457d750d SHA-1: 4524003d4a7befa0209494958ad358522ec8e542 SHA-256: a543b8362b84ef2ae3258380081e060975cb34f5c6ef0c3b9b23f9cd857a38e1
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and one prominent URL suggesting a 'Honeywell 8000 installer setup'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into downloading or visiting a harmful site.

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://baarspo.ru/strik?utm_term=honeywell+8000+installer+setup PDF link annotation
    • http://uspex22.online/pose_streaming_vostfrfkh3f.pdfIn PDF document text
    • http://shtangye.xyz/invoice_file_sampleb3ifh.pdfIn PDF document text
    • http://reduslim-official.website/fomevunedl62v.pdfIn PDF document text
    • https://nopuwilimo.weebly.com/uploads/1/3/4/4/134490360/jotexagoraxukaru.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/2398378.pdfIn PDF document text
    • http://rrrrkkkkk.space/30241040317mrk6r.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jb3Xk4k/auto_clicker_automatic_tap_true_developers_studio_2020.pdfIn PDF document text
    • http://pesuzukotejoki.iblogger.org/45060975484.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/MidM2gh/skull_anatomy_occipital_protuberance.pdfIn PDF document text
    • http://brumbum2.xyz/sikesoromedozitejowolebbw0x4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kelujatideligo.epizy.com/24899539379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2507017b-6939-4bef-8e2b-a6c89ca9892f/xosigafepe.pdfIn PDF document text
    • http://wuwovedivaz.rf.gd/soteninotaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0153b641-dd6b-40e6-af5d-edcff2116a47/39156830203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cff6c8c-b0f1-450f-8f47-620fcc8bb280/79393285359.pdfIn PDF document text
    • http://kesabiladid.rf.gd/gesubovesanewo.pdfIn PDF document text
    • http://jilabof.epizy.com/pew_charitable_trusts_grant_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD789 5188 bytes
SHA-256: 7b100372a911443631898b671e8a1ba38cff2f7e6da873483974c616e322d7fc
font_01_sfnt_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 10796 bytes
SHA-256: 6c611523ce87c40dafa6d1d9fdc13405592f47b9b41a780fe069e2843ca52ef0
font_02_sfnt_off00010df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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