Malicious PDF — malware analysis report

Static analysis result for SHA-256 c261746206955bdb…

MALICIOUS

PDF

85.9 KB Created: 2021-04-28 17:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bd5f2932bdf08794ff4beeb1c54c4786 SHA-1: 5c4b36bb4ce5493fabf54566b8eac6e350a07ded SHA-256: c261746206955bdb2737795bbaaed1e026114025a32c04ecb80da6c2d07e7dd0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9992

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://jottigo.ru/strik?utm_term=converter+cal%252Fmol+para+j%252Fmol PDF link annotation
    • http://wefinexof.iblogger.org/97872800053.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/answer_key_of_ctet_2020.pdfIn PDF document text
    • http://magozeveta.iblogger.org/telecharger_ccleaner_piriform_gratuit_francais.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_604826307a02f.pdfIn PDF document text
    • http://dombitarf.ru/apeman_a77_manuale_italianopgno3.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/donofegemowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_6027bce993e7e.pdfIn PDF document text
    • http://desokore.medianewsonline.com/standard_horizon_hx870e_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_6011353d81e4a.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/examples_of_mean_median_and_mode.pdfIn PDF document text
    • http://mangalvpodarok.ru/10235179736kpq0k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_60329433b8b6e.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/62399876255.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/33c417d4-05d6-481d-af13-53ab7e351fdc/genesis_6_1_8_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0753f666-66ec-4dca-9b02-d1e7b0ee232c/cuisinart_coffee_grinder_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437188dd-7f61-461f-8bbf-7850f7eb4160/poxuruloved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4f3efd-6c46-42c0-828f-cfb815cc0ea5/53203178965.pdfIn PDF document text
    • http://sodakavebiku.rf.gd/princpios_da_administrao_pblica_estratgia_concursos.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/apsc_syllabus_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2444b26-af90-436f-a539-2a767d544c8c/does_brenda_die_in_the_maze_runner.pdfIn PDF document text
    • http://buralusu.rf.gd/bofam.pdfIn PDF document text
    • http://vavuduzika.epizy.com/57847044059.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_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 4980 bytes
SHA-256: 368b87af3f193d17212e01cdc56f8130e5b7060f6ddb7b724215cc9e9bd21384
font_01_sfnt_off00011e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E36 13248 bytes
SHA-256: aed4ef375b0002b66bc81046bc07566bc6a5ae09c1595c93352a476cd22a3249

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