Malicious PDF — malware analysis report

Static analysis result for SHA-256 69aa9e2655952d49…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 22:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 574f9e7ec43474e76743ca6669a90b38 SHA-1: b17a67e149aa7642806cb6e14c1711b9efd42af0 SHA-256: 69aa9e2655952d49e5181cfc404cf464beb348f6171345d3a0b74676aa233770
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate an attempt to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=fiber+optic+cable+types+and+uses+pdf PDF link annotation
    • https://cdn.sqhk.co/rivinodati/iidjhia/razulafasizaresunatepev.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/YjeEUYT/drag_and_drop_not_working_virtualbox_ubuntu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_605222bc08a2c.pdfIn PDF document text
    • http://bobakolanuvam.22web.org/tedikuvuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_5fe7c5b71ecfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_600e014526cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_60254ae649a69.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/ezahfjh/moxudadumezepogawi.pdfIn PDF document text
    • https://cdn.sqhk.co/lupananonutu/hiyjjUg/basha_movie_whatsapp_status_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xijupurif.rf.gd/vitukegotedakijireluguba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8100d498-d73a-4273-83ae-3777f577fff5/what_does_restrictions_a_mean_on_a_texas_drivers_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86dad107-d074-4660-81eb-f5914acfdffa/cie_a_level_biology_topical_past_papers.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/82698350769.pdfIn PDF document text
    • http://lutewefopuv.rf.gd/math_problems_for_7th_graders_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4f961c-f787-40d8-aea5-cdd4be093abb/jikewilizejogewav.pdfIn PDF document text
    • http://kunasajijujaf.rf.gd/ableton_live_10_keyboard_shortcuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf3cd39-6831-40c9-8fe7-c82c6d02bfc2/47773336875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daad9b66-4b30-4922-b180-273c9a59ab29/xaxuzeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef5b018-5e2a-48e8-8949-51ea4718f8e7/dell_v313w_scanner_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6643309-a555-4f91-8995-817e9bf6d429/whirlpool_duet_steam_dryer_making_screeching_noise.pdfIn PDF document text
    • http://guroven.rf.gd/47497666829.pdfIn PDF document text
    • http://diverozisutujew.epizy.com/nice_guidelines_hrt_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc847d82-cc4e-4fb1-bb8d-c14dc903f3a5/best_dawsons_creek_season.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d625f0-2b13-410b-89cc-04355ed6563e/blueprints_internal_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c3edb7-7f8e-41f4-a56f-02cc155ce1d5/94266883223.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_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 5348 bytes
SHA-256: eebdf6224737a30ffb9e89df2ba51a84bcb61d36484ef1447659ad0273e52ce9
font_01_sfnt_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 10416 bytes
SHA-256: 0e2856cbc8946c7ed64f596ded5f177a89a6444889facad22f911b297202a2ab

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