Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1166906b41fdaa…

MALICIOUS

PDF

108.8 KB Created: 2021-04-04 20:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 645c3a4e4fff7b118c52da0ec8694bd2 SHA-1: ebd9e5ad2ffd3c2ed3a3f40933f8e478221b7fd8 SHA-256: ec1166906b41fdaaf98f3d14de98c35fe68e8083a763816559c38afc031df184
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 0.9867

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://lozipotod.ru/award?keyword=accounting+dictionary+english+to+gujarati+pdf PDF link annotation
    • http://wisemad.22web.org/quicksilver_throttle_control.pdfIn PDF document text
    • http://topplafond.xyz/whirlpool_water_cooler_not_coldhhp20.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/30561.pdfIn PDF document text
    • http://gachihyper.xyz/vizio_d43-c1_remote_codeugeqx.pdfIn PDF document text
    • http://copyrightreports.com/28854273689oxtd8.pdfIn PDF document text
    • https://fadesirowawilej.weebly.com/uploads/1/3/1/6/131606674/zijilokiruxeb_sazalegof_xigamik_lelasi.pdfIn PDF document text
    • http://kismyketio.com/slow_motion_video_app_android_freeljj83.pdfIn PDF document text
    • http://mezazasakejel.iblogger.org/40421240336.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/7925165.pdfIn PDF document text
    • http://sibuvre.com/6413807160d3lyg.pdfIn PDF document text
    • http://xojitufos.66ghz.com/30516737359.pdfIn PDF document text
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/f2b85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8b6f6a0d-c1ab-490f-bae0-aed4af7ad8f3/7685778407.pdfIn PDF document text
    • http://kapuvomerar.epizy.com/13155331676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b93c26-f986-4d67-80a4-bd7cd2fd4ea3/94826248960.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/disetav.pdfIn PDF document text
    • http://riwefub.epizy.com/lugaxekizezovuxurak.pdfIn PDF document text
    • http://viwuleraxukopiz.epizy.com/mobile_battery_charger_app.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/rubber_duckie_sheet_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/how_does_verizon_hotspot_work.pdfIn PDF document text
    • http://tizabapokumi.rf.gd/1286171860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaccb225-8e20-469c-8b81-68d34770858f/zipop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95838537-1107-4465-bc3b-8ca6ba99af75/how_to_summon_the_wither_storm_without_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7dd1a5-ec21-4c71-928a-8813a6ba354b/delezusi.pdfIn PDF document text
    • http://kedumuwimafam.rf.gd/54373595421.pdfIn PDF document text
    • http://nopuzowisaw.rf.gd/roxeputapobamafakofiwabof.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/civil_engineering_material_testing_lab_manual.pdfIn PDF document text
    • http://bimogudi.rf.gd/after_we_collided_release_date_uk_cinemas.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C5 5464 bytes
SHA-256: f8cee76bafa2e37e954281a87d953dfdf1435b50919972b326e9012d04b4a0af
font_01_sfnt_off0001375a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375A 8712 bytes
SHA-256: 32834e67e2ab261bfb758c477309ac8ad44f58d2f9afb4b622ac08ad4f937deb
font_02_sfnt_off000153c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C9 12988 bytes
SHA-256: 80dbdcb906f8c7360d0596298e0617e8af58e933594a2ea8a5782d3214b44403
font_03_sfnt_off00017f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F20 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87
font_04_sfnt_off000193ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193EA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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