Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00d9667dcd3ebe4…

MALICIOUS

PDF

93.9 KB Created: 2021-06-01 08:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8d365191ce8538e7dd3882eba1e95f8b SHA-1: dae21c3ab17b71f52899c867533c7fbc0a74efa1 SHA-256: f00d9667dcd3ebe444f05572bf623bf40d15bf3ab61d507cde6d6dbc52023cdc
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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=adjectives+worksheets+for+grade+3+with+pictures PDF link annotation
    • https://xolawawasaxigu.weebly.com/uploads/1/3/4/5/134587427/9064948587ef334.pdfIn PDF document text
    • https://kizufujuzuvajet.weebly.com/uploads/1/3/5/3/135316206/mijefu-rosumuwutixazom-funikoxipow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_601e4f04485da.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409628/normal_60b0561e2d57c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_60645af325260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5fcebd3373d39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_603dc9bc6f181.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/54b460ff-d08a-48e6-824a-1d6b3349c3f8/98163176607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15fb6f2-adff-4237-910f-35f8ebdbb330/what_were_the_12_apostles_called.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/oracion_del_credo_catolico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a311e6-1ef2-40f4-92d0-fc7b827c7d06/how_do_i_create_a_work_plan_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d316b8a-2c05-4b32-86ad-e950cade6d3e/sozoxufibulomefuzer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bb8278-6d5e-4a73-a35c-c35ff6813d64/lotus_car_price_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835f24b5-f4ba-41cb-b091-4c4cab385ea1/9701695786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853918b3-b097-4e85-8ab2-944dfe90482d/bivukomovobeporep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887e3fec-3d06-48f7-a0be-5e82d568db32/the_lattice_energy_of_solid_kcl_is_181.pdfIn PDF document text
    • http://dimutojopog.pbworks.com/w/file/fetch/144445110/sanam_teri_kasam_mp3_song_downloadming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32101dee-898d-4360-b827-eecdfb583d19/vocabulary_workshop_level_b_unit_8_answers_choosing_the_right_word.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/f/2015_jeep_renegade_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf2ad35-b752-4709-94cd-985150206005/varugidejafekeboki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7c4e76-f781-4d0b-83d3-5821bb5fa2fd/hp_laserjet_4050_toner_compatible.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/nadetofojomotikotebupagik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf735d7f-463d-402e-9647-e6ea2a29e495/xukamivevazixemuxamo.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_off00012d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D74 5832 bytes
SHA-256: 9b98734a50f26de3425be6d4292e45a9d0b9115a7698fcac30baf7b0fccbb3b3
font_01_sfnt_off0001416b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416B 11924 bytes
SHA-256: 57ba56636efc911933bf8edb61553b0793727bd7de125f067cc2722887af5981