Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb262c2988adfd9…

MALICIOUS

PDF

79.4 KB Created: 2021-06-11 04:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4c82cd304a898bcf8a284f65826e050 SHA-1: 9991f90fa7d778576ce06fc7ebbf8d11200bbc6c SHA-256: beb262c2988adfd999c31eb747203b5376a0d2fb233795cfdded3edfd1bc3b26
194 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. It uses an invoice-themed 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 0.9967

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/pbw?utm_term=how+to+tame+animals+in+ark+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443357/normal_6051225bb4060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_600a0520ccefa.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368742/normal_60b275166baae.pdfIn PDF document text
    • https://dusimajigedavim.weebly.com/uploads/1/3/1/4/131453199/4e604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_60b9b49c4496f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5ffc9c0d259c3.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/6573369.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/4471793.pdfIn PDF document text
    • https://sipemesiga.weebly.com/uploads/1/3/4/0/134095973/gobotisijeretewaja.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/aef3e87a-0746-4693-88fb-94e736cdea4f/57321099740.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/54855608114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33949b67-4b51-4dd2-9407-421627dd2d8c/lencioni_ideal_team_player_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d949daad-037a-4b50-9c05-1b2c07f36ee3/panasonic_viera_55_inch_weight.pdfIn PDF document text
    • http://kegogaxevu.pbworks.com/f/my_talking_tom_2_mod_apk_hack_unlimited_money_and_stars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bc48ef-319f-4c3e-8f96-fb82596eaf78/what_kind_of_fruit_can_i_eat_with_acid_reflux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28301a4f-b0ce-43b1-b5fb-e28d715591e9/skyrim_se_pc_load_order_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4a82cc-d3c4-4be2-9027-9aada6143da0/what_are_hearing_aid_power_domes.pdfIn PDF document text
    • http://nenikobowon.pbworks.com/w/file/fetch/144796758/36559879639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b98abc1-d596-4436-b76e-871597584b42/polaroid_40_inch_fhd_led_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b0504f-ebeb-4dc3-9dcf-2e37ebc8ffca/ejemplo_de_monografias_cortas_para_niosp.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/145104822/repufuvimuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a5c3eb-a81e-4874-a83b-586b35263e9f/26875149810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade52e99-429a-4a37-a1db-cad550b18248/webegawodolatej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e4d727-0530-4994-902f-cfc14c5b4bf3/norma_de_inicio_de_ao_escolar_2019_minedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c8b1f7-b208-45dc-8af2-1d24c701f719/2.1_comparing_and_ordering_rational_numbers_worksheet_answer_key.pdfIn PDF document text
    • http://lopasexosew.pbworks.com/f/84746712423.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_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 5088 bytes
SHA-256: ca26a66752204e223f60c344e43ec0e16f4f7d4868af9281322b3772aef359a9
font_01_sfnt_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 10584 bytes
SHA-256: a37f914b20b12b5ec77c1c5129b8eafdf3ad8ad03063c101b762bfdc2071537c