Malicious PDF — malware analysis report

Static analysis result for SHA-256 e078a0e81ce0f232…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 23:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b11d98c15e844fd9de7d05299d7f7559 SHA-1: 8be2f0d123866b30eb736757bd21c2ac21734a25 SHA-256: e078a0e81ce0f23209aef35665fd94ee8e0a3eeafa226df218549fccf00479e3
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 0.9990

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=mililani+high+school+bell+schedule PDF link annotation
    • https://zebidomixivo.weebly.com/uploads/1/3/4/3/134326720/pegiwekezo.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/2020_calendar_june.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/volume_of_prism_formula.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/velazafegi.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/ged_math_practice_questions.pdfIn PDF document text
    • http://jovopomutulilo.medianewsonline.com/wonder_woman_1984_screenplay.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/icao_doc_10057.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/vampire_diaries_cast_season_3_episode_2.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/rafireji-kibipe-lokofesed.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/webax.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/reliance_company_balance_sheet_2020_18.pdfIn PDF document text
    • https://fepapidatimupiv.weebly.com/uploads/1/3/1/4/131437812/tubube-fakupixaz-tufazirebosagat.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://faxiruvud.myartsonline.com/how_to_clean_magic_filter_of_samsung_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613c56db-f320-47bd-af3d-518980e84ef3/referat_modernism_vs_traditionalism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a54a26f-a636-4813-89e0-a23561b6587a/bmw_e39_wiring_diagram.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_1f23fdff8ace4fee98a528f2aeb93227.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovitiku/church_information_card_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdcc2e1b-cc29-4572-8533-68fc7a9e5fc7/3066751838.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/raxipupomiledofujolil.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/70467960950.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/85814567868.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/astro_vision_lifesign_horoscope.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_06522a8de45245178808ee4653b9c4e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f477a6-94de-43e7-9cd2-4db8dc993d2a/wopele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4f44c6-a3ac-4af8-bdd1-b976f7e09e10/39521730810.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_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 5052 bytes
SHA-256: 25d8ca2b50abe9a614c47b8de62cbdef0c24211bde06f2319b320c0ae7bd9e72
font_01_sfnt_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 11128 bytes
SHA-256: 70b65098e28c185b8df8387e3ae152d6620886f031515c120c0ac6965596d54a
font_02_sfnt_off000127be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c