Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac67af1670b64f69…

MALICIOUS

PDF

75.5 KB Created: 2021-04-17 06:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d22c842b2b6042da874f557351ea4594 SHA-1: 50eaf388a5336ab83d4dc8e1ac6c0a7fd8dc6060 SHA-256: ac67af1670b64f6913fe23b862d8cae1b5029c01ca59a2cb8e991da101ebf223
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 0.9993

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://ponafet.ru/strik?utm_term=how+to+fix+lg+tv+half+black+screen PDF link annotation
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/fbe81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_606ce61ad30fc.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/lekabusugolixopijosijivop.pdfIn PDF document text
    • http://kolamudeluxom.iblogger.org/trx_easy_exercises.pdfIn PDF document text
    • http://zedateve.mypressonline.com/arkitektens_handbok.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/bexedixofiramixutoworax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5ff84add2e3da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454438/normal_5ff7c9120e6ef.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/3e718fb581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_60362a88292c1.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/romeo_and_juliet_important_quotes_act_3.pdfIn PDF document text
    • https://riginujer.weebly.com/uploads/1/3/2/6/132695799/8160413.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/zebitiruxavuxuf-lularapifo-jodibixusabi.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/51634756934.pdfIn PDF document text
    • http://subakegewoje.sportsontheweb.net/cambridge_igcse_combined_and_co_ordinated_sciences.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetavepizixe.epizy.com/46701749210.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/para_que_es_el_ascorbato_de_sodio.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/free_download_al_quran_dan_terjemahan_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a69df346-eb88-4161-8a7d-ef8e6b62bac3/why_does_smoke_alarm_chirp_with_new_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c42d199-ecd8-47b0-b92a-77fa2261eaf5/how_to_set_up_a_yamaha_receiver_to_tv.pdfIn PDF document text
    • http://bepapogijarepub.rf.gd/swimsuits_for_all_return_information_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e74dfa0-17a5-4d69-838e-023a3a2016cd/what_are_three_benefits_of_volcanic_eruptions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78572cb-b34a-4ee4-815b-494c79cc3e23/molofadamerulogabal.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_off0000e755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 5528 bytes
SHA-256: 554c49cbafca9b9984447bf89e33d701fa5759dc652324b76a41592e57d882bd
font_01_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 11000 bytes
SHA-256: 49309b9403abcd011ccc7e65d84fc17274c1c38ee7d6113d657779053d8419b7