Malicious PDF — malware analysis report

Static analysis result for SHA-256 e859f300823c1997…

MALICIOUS

PDF

176.2 KB Created: 2021-04-07 05:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9d95623eb08485f288893d376fbc074 SHA-1: 8402d4cab16b9683738dceaf90eff4ae2b5c141e SHA-256: e859f300823c1997d9b12f05a62f76c96c330869e2797b3f44b8db969f94a242
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 0.9984

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://resalured.ru/wix?keyword=salinas+elementary+school+district+jobs PDF link annotation
    • http://lamanixumerad.mypressonline.com/wumukofesupuladabelus.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/mipefiridodevava.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/genigovirizug-susivakozul-mizokawew-fikoxowezi.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/ao_smith_water_heater_warranty.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/gjgiojj/air_combat_pilot_ww2_pacific_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ahi6gjp/android_car_stereo_radio_not_working.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/vobaguxijazexajekeg.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/94k09gf/dictatorship_vs_democracy.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/jjahfif/super_mechs_hack_apk_android_1.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/fanusotu_gowila_kiviwijom_xoguxepasetanom.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/byhdGeZ/epic_games_free_games_list_june_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/II4jgcR/simifelemigitakopog.pdfIn PDF document text
    • https://xodimazu.weebly.com/uploads/1/3/1/4/131408168/5421340.pdfIn PDF document text
    • https://vemesefopega.weebly.com/uploads/1/3/4/6/134684253/5451986.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/hgiRvcC/7473636084.pdfIn PDF document text
    • https://cdn.sqhk.co/xevuvuxene/Sz3wDrI/42673360894.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://dafuwinev.myartsonline.com/49283060208.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/wsjt-x_raspberry_pi_3.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/92701982029.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/dancing_with_the_stars_sean_spicer_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/nisaponajipetugekomi.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/10834491797.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D08 5388 bytes
SHA-256: 7aa40f80a910a44378fefdbd1ebd613e75be4e6b3d0146574d0596c2f42b010b
font_01_sfnt_off00027f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F1E 11116 bytes
SHA-256: 6f0bf72038513bdc34450f2c4ebc9d26c99a1c763abb99c36857a636bf8c38db
font_02_sfnt_off0002a460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A460 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f