Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb866380f2401a74…

MALICIOUS

PDF

91.1 KB Created: 2021-03-10 20:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f02b700827f070c5d105e1c8c7be73f SHA-1: 93aff8e3809be73b28984e1f1750197db52cf48d SHA-256: fb866380f2401a74a716aa103cd5121d01ab3b830d6e336ad39f35d4e830d87e
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 0.9951

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://midufefew.ru/wix?keyword=shin+megami+tensei+iv+ending+guide PDF link annotation
    • https://cdn.sqhk.co/supetuzitepi/gf4idhb/caveman_adventure_download.pdfIn PDF document text
    • http://buluzapigal.22web.org/sujaxisifonesexaxemuva.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/the_help_by_kathryn_stockett_review.pdfIn PDF document text
    • http://mibosaputir.22web.org/vidmate_apps_karne_wala_gana_video.pdfIn PDF document text
    • https://cdn.sqhk.co/petebodok/8ibihjg/funny_lock_screen_pictures_for_phone.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/dir-655_reset_to_default.pdfIn PDF document text
    • https://cdn.sqhk.co/povuguzuloga/higfhd4/foxezokagezi.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/avent_bottle_sterilizer_instructions_how_much_water.pdfIn PDF document text
    • https://cdn.sqhk.co/lajakukilo/gceghge/68582072301.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/ShY8ihW/skirball_fire_ucla.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/88681340068.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/seismic_design_reinforced_concrete_structures.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/6af31127-f7af-42d3-b6f1-0a99c34ff0dd/fuwuziko.pdfIn PDF document text
    • http://garapaf.epizy.com/arduino_mega_2560_datasheet_espaol.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_461e32744e0448bfaaca37d3ea173aef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/wabozoxivuju.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_63947eea156a47bb974c4d30c189a0a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedowedi/wufabitesirakar.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/star_wars_family_feud_board_game_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede856a3-7e24-4d5f-a2d8-aecdb0d4884c/34707382712.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_0b376a20d25449a29cf3218498a02b67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb41b42d-beb8-4650-b9b6-016df41c1d41/21371585119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e09833-fe15-49f4-b0a5-d179436abd4a/saravowerudu.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_23f167bba914493cb52181f25c0424ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/gba_emulator_for_android_2._3.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_428b1dd6b2a54d09a17467fd20a9ab2e.pdf?index=trueIn PDF document text
    • http://sonubadu.epizy.com/pollo_loco_chicken_bowl_calories.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_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 5856 bytes
SHA-256: 5c6c0a6d24adc863d9200dfa42055863bbd179f725056280c791db1d439887d3
font_01_sfnt_off000127b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B6 5272 bytes
SHA-256: 22b6ad3aedd1f7d567d9a6a1904d63d551391d68833f3e58d6ec2b7c7df8f449
font_02_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 10796 bytes
SHA-256: defbfd4c6408181209b6a21095989ec0424140fc7da96472aaa492d784f7fc04