Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd10cfa86c51a8a3…

MALICIOUS

PDF

91.8 KB Created: 2021-03-18 04:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 555ec023c92ae84ba8a3979e6f311f64 SHA-1: 5ed6e569b3c3e6b7aec13eb9cf7ac5c616962738 SHA-256: fd10cfa86c51a8a3b6a5cd498a748e5850cdb8b6eeb24a9f1c0476448e003f52
126 Risk Score

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 0.9919

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://resalured.ru/strik?utm_term=navy+technical+directives PDF link annotation
    • http://chebsvet.ru/rudodipikatiph6my2.pdfIn PDF document text
    • http://bogplaktnc.fun/xamaput6g9r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_60060fdfe1f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_603e460372698.pdfIn PDF document text
    • http://axecheat6.xyz/million_dollar_consulting_summarywzmrn.pdfIn PDF document text
    • http://boomua.site/76417038052zwnzb.pdfIn PDF document text
    • http://vnds-super.space/digiday_media_awards_europex5uqc.pdfIn PDF document text
    • http://cupe1.ru/mahjong_solitaire_free_online_gamesughdl.pdfIn PDF document text
    • http://pshcomonhere.xyz/bipavadosso4b2.pdfIn PDF document text
    • http://panijawukufo.iblogger.org/biharmasti_in_2019_video_dj.pdfIn PDF document text
    • http://dhl-order.info/rikunemowakezuleluicxcs.pdfIn PDF document text
    • http://bachanalytics.com/motosierra_narco_tube_decapitadosaj3ec.pdfIn PDF document text
    • http://opensol.xyz/adverse_events_following_immunization_formzsr43.pdfIn PDF document text
    • http://gtmedis.com/pimoxepamovivalarav8zia.pdfIn PDF document text
    • http://teachost.com/craftsman_dls_3500_for_saleg5mw1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447258/normal_6019731391bdd.pdfIn PDF document text
    • http://3-bureaureport.info/the_power_of_a_praying_wife_full_bookuu9j6.pdfIn PDF document text
    • http://okstore.info/samsung_rf28hmedbsr_aa_not_coolingkfxv4.pdfIn PDF document text
    • http://luchdobro.site/gutukobigepewogituwezjtlro.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://domidezoraz.epizy.com/74379957866.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/weather_report_nyc_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd03ee7-336a-4c6e-9fcf-09ee8a845389/80909087300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2b310b-b9a1-4e90-9b72-55302fef1b4c/rosemount_3051sfc_ordering_information.pdfIn PDF document text
    • http://kemuvatixas.epizy.com/tizexazajatuvudupinorax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524af79b-716f-452b-afe7-684c8ac311f9/32785512284.pdfIn PDF document text
    • http://vudidesodus.epizy.com/hodder_cambridge_primary_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f92dcc2-8071-4e93-8241-01f722feb8d5/wodudalapanasibi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 4836 bytes
SHA-256: dbae4c4336f685a89dc3ef7dbb50b8155a451e8be0b9b21d061791e05cf8d1eb
font_01_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 10760 bytes
SHA-256: 7d282a31d6f5b5b4fe01536f5948342ddb67203cab39a7cd43afeb52cb0cdaa1
font_02_sfnt_off00013c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6E 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off0001519b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3