Malicious PDF — malware analysis report

Static analysis result for SHA-256 3859b6e12addef61…

MALICIOUS

PDF

71.2 KB Created: 2021-03-06 07:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a507814ada0bc245ec7088bde52a983 SHA-1: 2f4a6892348b06cf2e94015735d98b2d51b0742e SHA-256: 3859b6e12addef612a2654e831d4bb37e698c060bda4f00362917dc84702d148
186 Risk Score

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. 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 0.9991

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=d+and+d+auto+repair+lewiston+id PDF link annotation
    • http://matroskin.space/332317736984m2gi.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/weluvadiloju.pdfIn PDF document text
    • http://duplicwcnj.space/nigab5u6rz.pdfIn PDF document text
    • http://crispyset.online/situdutenazosodede1l0z5.pdfIn PDF document text
    • http://lagidonak.mygamesonline.org/how_to_increase_arcane_power.pdfIn PDF document text
    • http://kuliwegi.sportsontheweb.net/2008_honda_accord_ex_maintenance_schedule.pdfIn PDF document text
    • http://mgacessoria.online/how_to_make_a_hooded_cowl_crochetfj587.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/65554365044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_d5fd32b3adcb46dd97c44301ce42229e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2b07d9-45d7-40e9-881e-d7645b6a91ef/21285092139.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/vetuvem.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_256d7ff667304484b861807131de428e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/925ac207-6fcb-4bb7-953d-d729e2d3a4b9/us_sailing_racing_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5bcc2a-82ba-4a27-8147-93cd7103427c/how_much_does_it_cost_to_ship_overseas_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca5d8f7-fbf6-40fe-ab7f-f3a44f9a9446/how_do_i_reset_my_honeywell_thermostat_th8110r1008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f61033-0930-49e0-9e96-89458a05e528/beginners_guide_to_digital_painting_in_photoshop_2nd_edition_review.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_35cc36cf1e384fa682a6854bcde49a14.pdf?index=trueIn PDF document text
    • http://kewumexor.epizy.com/wow_leatherworking_wotlk_guide.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_a05be1d6bef649688aa888ac43d76d79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6433fa31-1144-448a-b618-4095c7c19376/91991359711.pdfIn PDF document text
    • http://lesofowan.rf.gd/gexixikozutizoxatikij.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_dc26ba8a5c274559a57f5fcf1346bde7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c268a86a-508a-48af-aa9a-ee99c4263e31/sex_education_3_temporada_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e858ca16-8f67-4a02-9d50-9c881f8ebeda/63864316555.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_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 5044 bytes
SHA-256: 016601735b17c153171b200b954a5efaf443e793531ad10c5025164c04f69f70
font_01_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 10776 bytes
SHA-256: 9b5427d46add35cf621bc770d38805c2870769ee39c6d25b62c2d2fbda3e649b