Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6fe7f5cb56ee13…

MALICIOUS

PDF

165.5 KB Created: 2021-03-17 04:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0c8219bedabab754a0c6f870a45f5f31 SHA-1: cc69006f07ee23d8de4fbbea0b775fe08706a198 SHA-256: 5a6fe7f5cb56ee13ca355f67a24d22277c044ec10ee3a18c735d551d50191e43
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://leonvi.ru/wix?keyword=the+american+civil+war+word+whizzle+search+answers, is the primary indicator of compromise and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=the+american+civil+war+word+whizzle+search+answers PDF link annotation
    • http://funasowuto.getenjoyment.net/87275526108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff8d8f8ad629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_604a7c519d97e.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/the_raven_analysis_edgar_allan_poe.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/50436765628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_604cda9329be9.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/nwn_ravenloft_module.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_5fe9fee06601e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_603b09c8512a1.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/a9de023a-8e6a-4a29-9d15-99e2a6723627/24449656638.pdfIn PDF document text
    • http://nanomunem.epizy.com/wapking_movies_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/hypertensive_urgency_aha_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88eee50-318a-473a-aa2c-bf6323d5a4e8/how_to_set_up_home_alarm_system.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/furaneponupirebuwera.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/379237186.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/scared_of_the_dark_ringtone.pdfIn PDF document text
    • http://robavumu.rf.gd/cara_membuka_file_chm_di_hp_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f2b48d-b9ff-42cd-91b1-b1aec11df5e0/honda_shadow_sabre_1100_solo_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496dd74b-7909-45f8-badb-7f10c750455b/bbc_learning_english_modal_verbs_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57db6c34-5531-48c2-b041-bbf180a4408b/walujotesegozesito.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/persuasive_essay_brainstorming_worksheet_gcu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/gilovexajuzuvaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/dazegariradaraxobizavuk.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_off00024df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DF5 5328 bytes
SHA-256: a5f473c6b3dd23bed0e7c0c48e8c59d5009aae4b82839d2a70b92ed458a70f9c
font_01_sfnt_off00026003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26003 11216 bytes
SHA-256: a8ca46d0ca334c43a90dea06b7bf6959c3be74b5a907191dab1be9ca85fbeea2

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