Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d08ca781ee41e3…

MALICIOUS

PDF

85.6 KB Created: 2021-03-09 09:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bb734c996458a7caffeb96bdf99a355 SHA-1: 9dcce32ca6b46c8ea7b593c47b30cbc8910cc79e SHA-256: 63d08ca781ee41e362f56e2cca71af10c569a9c832c9e9726582915f34869acb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://dugedepap.ru/123?utm_term=my+android+phone+cannot+connect+to+wifi PDF link annotation
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/a93ed856.pdfIn PDF document text
    • https://binezorimitujux.weebly.com/uploads/1/3/4/3/134337637/kakud.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/cFJaifJ/hide_photo_video_app_lock.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/29715149875.pdfIn PDF document text
    • https://takotowi.weebly.com/uploads/1/3/4/3/134356266/rewanefani_faxazo.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/international_journal_of_medical_sciences_and_current_research_pubmed.pdfIn PDF document text
    • https://gavufiwi.weebly.com/uploads/1/3/0/7/130775220/fikefus_gowuvufadum_banezulusux_tijobawijonexuw.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/petusak.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/how_to_loosen_harness_on_evenflo_car_seat.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_to_start_a_beer_garden.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/gfuLUhe/at_t_watch_tv_channel_lineup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapajafikotu.rf.gd/75577333243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca2e286-37b6-44cb-adea-a215bebdbe4e/jowilumeredagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d3de63-f1f4-4920-a7ac-c891980bde91/zomaroref.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/grundig_satellit_750_external_antenna.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/retuxegikugo.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/60_years_of_challenge_book.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/the_basic_works_of_aristotle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a941879b-ab78-488c-8b92-cb743ecf792d/67099899501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f7de7c-4545-4f4f-8667-f16dde9c8e2e/kiberomedinine.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_off0001106a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 5232 bytes
SHA-256: 963ea962edc0c01d3ecea18c36160b7425f5a824b0cd46f19cc2ba23636c7ae8
font_01_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 11368 bytes
SHA-256: ced349b4564eb292775d4763c132635271f3889db8aea7a631577fb44227a705

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