Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8c702e687f9e24…

MALICIOUS

PDF

82.5 KB Created: 2021-03-19 11:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 064948f791302d45fab14fc1906175d5 SHA-1: 10d0ca2a6766b77062320e7da7de43e207f1df24 SHA-256: 9c8c702e687f9e243f7bdc36a59d56efab22e1555480128831f2776746511880
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically linking to a page about 'dangers of smoking essay pdf', suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://golowaki.ru/award?keyword=dangers+of+smoking+essay+pdf PDF link annotation
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • http://abreudesigns.com/dd_player_sheet2qtf8.pdfIn PDF document text
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/xetidopivuzapap-pomalenolorogo-bitonale.pdfIn PDF document text
    • http://sreda.city/10973496402z9zb3.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/jfvxEid/confirmation_message_template.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/ihjchxK/best_chocolate_cupcake_recipe_tasty.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/jifojafidukaj-gelapinebivarom-wadotebinugiwa-bimobematafolok.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/dilapunitobujuxirokuf.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/gijct1G/corleone_online_head_template.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/troy_bilt_super_bronco_tiller_engine_operators_manual9rl18.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/ravenegex.pdfIn PDF document text
    • http://skidki-day.shop/ready_made_projects_for_electronics_and_communicationz172f.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/WRtgehc/temple_run_2_game_free_play.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/cateye_wireless_manual_strada.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/tokyo_2020_athletics_schedule.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/zusuw.pdfIn PDF document text
    • https://mumojugaweweran.weebly.com/uploads/1/3/1/0/131070520/rorisaxuzukofe_xumobukol.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/vivesifek.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/zopuwewej.pdfIn PDF document text
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/bulotepadike.pdfIn PDF document text
    • http://probmake12.xyz/wuvoz3ttqz.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/mexefiriv-wuvun.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/57932250378.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/28861283684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotaferuju.myartsonline.com/8226658843.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/8764743750.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_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 5496 bytes
SHA-256: d081cf9695f7931663dd3ebc39681431c1cb8c60d7af1e01667b747341eeb878
font_01_sfnt_off0001154d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 11600 bytes
SHA-256: 600b9408253a85f56f2983ecb1763985723a07c779148d780fb1971e18de8aba