Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fde49ff3302624…

MALICIOUS

PDF

75.4 KB Created: 2021-03-08 21:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 48b44fef95fe9315c2553193d4d72cae SHA-1: 4bd4f51be5952b861094b3d66b0a0ef6a09c6262 SHA-256: 76fde49ff3302624c3a77de20c19772282616c22552810ecf93838c1ef2c78a9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous external links. The document body, though heavily obfuscated, appears to reference 'Netgear wn3500rp reset', suggesting a lure for users seeking technical support or troubleshooting information. The presence of multiple external URLs, many hosted on disposable domains, indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://zajinet.ru/aws?utm_term=netgear+wn3500rp+reset PDF link annotation
    • http://how2clever.com/casio_fx-9750gii_games_downloadfonx6.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/kikotul_wajabogi_pidekozed.pdfIn PDF document text
    • https://neseriduro.weebly.com/uploads/1/3/4/8/134851425/76ecbbd4.pdfIn PDF document text
    • http://bioforcecolumbia.site/whirlpool_cabrio_dryer_stopped_spinning8h7vu.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/28036857845.pdfIn PDF document text
    • http://nutristrike-shop.ru/ibaco_ice_cream_cake_menu_with_price_listdca55.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/baradi_tunigegajebaku_nubiwiwevunev.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/i_too_sing_america_julia_alvarez_theme.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/6-3_practice_tests_for_parallelograms_answers.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/gojunigibuminux.pdfIn PDF document text
    • http://gobigs.space/report_abandoned_car_aucklanddsi0a.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/5732198002.pdfIn PDF document text
    • http://pokemonrivals.online/pandora_s_box_6_gameswwpsz.pdfIn PDF document text
    • http://businessoutsourcing.org/wibedilis609s6.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/53060949326.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/27ff9965d6.pdfIn PDF document text
    • http://jobs-ingenieur.best/950727760753yoy8.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/grays_anatomy_book_citation36hjd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/boliden_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9d7a22-5de9-4717-ae56-6bfc43ffda11/55323176710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0820097c-9c22-4248-b06e-6fa24f780099/42764104875.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/the_georgia_guidestones_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1f21fb-5084-421e-af00-a8437a636778/who_were_the_12_gods_of_olympus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c524649-9732-4c29-9f8d-5177cf803147/dd_3.5_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f2b371-458b-41da-92a8-c44e20ca8c01/images_of_organization_gareth_morgan_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/anganwadi_sahayika_form_bihar.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_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5444 bytes
SHA-256: ccc1cbe26e9a03e586cf3854b2e08294109f2b3f629a00a2d219f53fd0f544b4
font_01_sfnt_off0000fbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC5 10604 bytes
SHA-256: 5766ffc508046340b2a6cae3af181d0670edf3f24f7b45c6a1754f1875884f91