Malicious PDF — malware analysis report

Static analysis result for SHA-256 717e8ee50b00711b…

MALICIOUS

PDF

89.4 KB Created: 2021-03-15 13:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ef3cf7eabbb19fbed8371b985a335161 SHA-1: a8fa13702528d778d7ad5a193e27ac60e87818b2 SHA-256: 717e8ee50b00711b06b77c28efa1cc80ee8df469d237be4122f280c33b495ba0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malicious content or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=jack+frost+x+reader+deviantart PDF link annotation
    • https://gujijuxe.weebly.com/uploads/1/3/5/3/135326775/3a7fdd3dd2c93e7.pdfIn PDF document text
    • http://lg-copyrightforms.com/71548226518t7ijh.pdfIn PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/viregekesipojux.pdfIn PDF document text
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/tavaj_dodavowumavego_bibig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_6014ebd2b8232.pdfIn PDF document text
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/mupetikafo.pdfIn PDF document text
    • http://nesobaka7.xyz/88435656025gnrdj.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/comma_splice_run_on_fragment_quiz.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/2010_chevy_malibu_power_steering_pump_location.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/bologna_guida_turistica.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/aerosol_spray_paint_sds.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/20983819888.pdfIn PDF document text
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/movazuf.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/2d_animation_software_free_download_full_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_604d1f378850a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_600611740f1cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupizamowakop.myartsonline.com/why_is_water_leaking_from_the_bottom_of_my_lg_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/soguvazowijoz.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/pojewubakirifoxotukosiz.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/guitar_chords_lesson.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/dejasitibowozoxelajolij.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_off00011e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E35 5164 bytes
SHA-256: 749b1db996b9c7e8c3d719093fff494a03044a3174a13ecad645f529f870295e
font_01_sfnt_off00012fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE2 11576 bytes
SHA-256: 0b8421c3b2977d02d489adb57acd8c224b6b4d785600cbabe9954fb5e642c49f

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