Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e0f3b6578bab08…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 01:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bda2ec53c279e86b399ec5a352448daa SHA-1: 0f42bb387ba7f814d13f094bccd7eac9cdd4811f SHA-256: 04e0f3b6578bab08a1c292490839b44001aa1f93f2c292a7a0c3c2df32e935fe
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://pelibifir.ru/123?utm_term=history+research+paper+outline+template PDF link annotation
    • http://felesatediz.medianewsonline.com/tipos_de_anemias_en_pediatria.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/13b5823c-fffe-43d6-af7d-601bf6ba40f6/bank_compliance_department_responsibilities.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_cdff5ca41f064693ae39cffd1d508410.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_cd03ce12469149e7847ffcbe5a040adb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2ebd02-ea44-401d-98c2-7ebbc05f38e3/game_of_thrones_season_6_full_movie_in_hindi_download_filmyzilla.pdfIn PDF document text
    • http://dewonatazuji.epizy.com/raisin_in_the_sun_walter_dream_quotes.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/cheddar_s_scratch_kitchen_menu.pdfIn PDF document text
    • http://mewilibuze.epizy.com/ringtones_naa_songs.pdfIn PDF document text
    • http://tonunipuwe.rf.gd/sofigivuxesonamag.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/21176930350.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/scanner_canon_lide_220_fiche_technique.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_988408d0b0f94411a0c1555c1ab64f79.pdf?index=trueIn PDF document text
    • http://pekafujojef.onlinewebshop.net/the_journey_of_man_a_genetic_odyssey_video.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_44435fa5b39d4c659e0fbb73db80d1b6.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_0a91d79929394a228e3e89e0736cb2d7.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_a81f0b4602254d39849150de0a31e349.pdf?index=trueIn PDF document text
    • http://zefinut.rf.gd/gozodamum.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_96557e045a50403892106a14a432092f.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_f71be4cde3114eb58a2cd60e9625f982.pdf?index=trueIn PDF document text
    • https://8de17e8c-b43d-4143-985d-773a0aa332b1.filesusr.com/ugd/01f6ad_905aef96bd5e4276a5eb21bd000a6ebe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9855cdc1-39f5-470e-91a0-8a5f15bd83c6/89721364468.pdfIn PDF document text
    • http://barirenuvekesup.epizy.com/banafe.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_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 5236 bytes
SHA-256: f834658b6c8b725c30693ac407f242e44de1ba71e551cddd4764dc7aff5a48a3
font_01_sfnt_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 10892 bytes
SHA-256: 8948734b169ea0160d8efa3545d9cd6e10e99dd86c16dd71dc0c68e7e6a4c8fb