Malicious PDF — malware analysis report

Static analysis result for SHA-256 b100e8d9aa195fc2…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 06:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 10737bdf88fba29190728aefe30fa005 SHA-1: bf23efcadf5b9ded39814209a37fd0f7673fdefc SHA-256: b100e8d9aa195fc2cf6137445e508636d1b5260282f9d0c882061a8e287eb06a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or malware distribution, with one prominent link leading to 'ponafet.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://ponafet.ru/strik?utm_term=eiki+lc-x80+projector+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445337/normal_602163e489f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_6037634a907ac.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/yhfjhpi/stampede_nightclub_houston_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/gd1jiid/serinizopilebus.pdfIn PDF document text
    • http://poliredebelokaz.22web.org/15886405009.pdfIn PDF document text
    • https://cdn.sqhk.co/bidubuwawi/ggVeNhd/homework_sheet_template_printable.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/28206817160.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/aVjiiiG/offshore_boat_races_lake_of_the_ozarks.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/folari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6047d9760cf4c.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://xipanizi.myartsonline.com/zukidob.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/towosixifiwufesuwafufug.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/niwufudifobidurugerolaz.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/sefixonejatuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/big_ideas_integrated_math_1_answer_key.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_e1d12e14b26940c1b566aca3f702219c.pdf?index=trueIn PDF document text
    • http://tiguwafagez.rf.gd/cazadores_de_sombras_serie_temporada_1_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/sony_cyber-shot_dsc-w800_usb_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/4991291739.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_6125761e8ee04df4a2324d141f35a5f5.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_73fb6e4da41a4e559ff19e71c868c9ab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5316 bytes
SHA-256: 34faa1e4eaf6722f40048b2580f6a85feab3682bb3894a7f3eaee237732481d5
font_01_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 11280 bytes
SHA-256: 7e5ea989e8316cffc15d9bed87281bd9a7fc3c2788ad1353a1b7298cc288fde3
font_02_sfnt_off00012093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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