Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bf5a7808f869b2…

MALICIOUS

PDF

89.5 KB Created: 2021-04-10 18:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a19e10785623710a3bbd2bfe4f936cc2 SHA-1: c3756e08227f4d5cc82a82102cc02c7be8a42e23 SHA-256: 61bf5a7808f869b21ace52827f1e2284ab7802992ebad311c65cf9983297b71f
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 0.9998

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 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://midufefew.ru/strik?utm_term=2005+cadillac+cts+starting+problems PDF link annotation
    • http://nizuloxodiza.iblogger.org/boutonniere_deformity_ra.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/75131428645.pdfIn PDF document text
    • http://momarivido.mypressonline.com/kipoxawarefewexile.pdfIn PDF document text
    • http://japuxivofag.22web.org/75384710938.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/gRSiaRE/48806986235.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/SsvKkqP/45756562162.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/celestron_nexstar_130_slt_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/vGglifd/79245833335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fewabasutagit.rf.gd/95872841790.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/chaotic_sword_god.pdfIn PDF document text
    • http://tegewixu.epizy.com/how_to_eat_healthy_when_pregnant_and_nauseous.pdfIn PDF document text
    • http://bejovivijif.epizy.com/jurabapokosekaperogonipo.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/mathematics_level_2_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad799f16-cd96-46e5-8b54-6e9b114a9a13/craftsmans_new_7-1_4_in._compact_sliding_miter_saw.pdfIn PDF document text
    • http://lisowinuxofifok.rf.gd/how_to_reset_a_timex_ironman_triathlon_watch.pdfIn PDF document text
    • http://mosuzuxogobet.epizy.com/astm_standards_material_list.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_a43175012dd746c3b2c9e7622d0ae935.pdf?index=trueIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_f1da30a7296b4c1c937c63ed3df7da9e.pdf?index=trueIn PDF document text
    • http://porimab.epizy.com/agenda_2020__imprimer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c229d4-6818-40fc-8bd5-2ee239b08b80/91603467334.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 5836 bytes
SHA-256: 1fb54e83d186be0c3c27be23ec25b027652976b14c9186f2b560358ba5de1584
font_01_sfnt_off000131ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EC 11096 bytes
SHA-256: c192981ba877795341676b76c42bd5e5f9ea0b3508b725844edea9271d391d49

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