Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0237ba5d92703ea…

MALICIOUS

PDF

80.9 KB Created: 2021-04-06 23:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a9e4c99c82f0fc4a69ac7035b3000816 SHA-1: 83804057b52e92d6135bc0cf506e33030c6408ca SHA-256: f0237ba5d92703ea18669d734dfd7fc3b274c25a4b4806e8134fac9ca3be6fc9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=how+to+fill+a+sundance+hot+tub PDF link annotation
    • http://vejuwetuk.mypressonline.com/71215338479.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/64375313795.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/41068626846.pdfIn PDF document text
    • http://presalon.xyz/bhojpuri_song_dj_2019_mp4ogudn.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/auditing_principles_and_practices_1.pdfIn PDF document text
    • http://localdesign.me/pofazojujusilosamizixoti92789.pdfIn PDF document text
    • http://taxoropa.iblogger.org/anarchism_guerin.pdfIn PDF document text
    • http://gagafelame.22web.org/anti_corruption_commission_maldives_job_application_form.pdfIn PDF document text
    • http://meetsalle.xyz/dell_precision_m4800_battery_not_charging3igd1.pdfIn PDF document text
    • http://genusttwsr.fun/lotovepowujusodazukepajunher.pdfIn PDF document text
    • http://biweekamnf.com/gibodevorojogevomotok5l7j2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenezipulugiji.atwebpages.com/bill_of_exchange_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f268a0f0-c160-416f-903d-8525e9bec18e/kexedixonexukivinixekos.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/40132705132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776393c9-1335-45c9-9c6d-dd6e11767178/pance_prep_pearls_spiral_bound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e5ae20-03b7-4532-b040-341f05df8aa7/mitebame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699c7593-5e1f-4e69-b773-4f111cdce052/15966965126.pdfIn PDF document text
    • http://fozozip.onlinewebshop.net/37934650411.pdfIn PDF document text
    • http://somujewod.rf.gd/briggs_and_stratton_190cc_lawn_mower_oil_change.pdfIn PDF document text
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_e10db546a3824dbeb736af8c5ffb23cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3e90ca-4eba-4d45-a8b9-3662060ad930/what_is_covid_secure.pdfIn PDF document text
    • http://wowawese.rf.gd/synthesis_and_characterization_of_zno_nanoparticles.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/paulk_workbench_download.pdfIn PDF document text
    • http://nonavijewiw.epizy.com/dajitapasumezugan.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_222a8d277a1148c8b6d5ea00b0812775.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_off0000fefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 5204 bytes
SHA-256: d53aa9762e03497d65018b4d461b4144799832979154edda1cd950f7aab1a2a9
font_01_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 10884 bytes
SHA-256: 8ed084c2f062b7ba8dfde8b3feaee5a7c3c8d9337869400f0dc47390571ac69c

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