Malicious PDF — malware analysis report

Static analysis result for SHA-256 96da19e3111b5fad…

MALICIOUS

PDF

73.7 KB Created: 2021-03-24 03:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5bbb17c145ed346ecfcdd44247a26bb0 SHA-1: db8ea3ff108dbef858b978989c9f796eb547aae8 SHA-256: 96da19e3111b5fadf181e15f19f997cc7304ce0464c5788d8c3423da2dfe473e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. The ClamAV detection confirms this, identifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=how+to+train+shoulders+without+equipment PDF link annotation
    • http://moshon.space/hockey_coaching_courses_near_meyim7d.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/rexokazarovane.pdfIn PDF document text
    • http://tumbaa.space/universal_audio_plugin_bundleh0i1c.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/belajar_bahasa_thai.pdfIn PDF document text
    • http://jitapikel.22web.org/mission_risk_game.pdfIn PDF document text
    • http://vashastrahovka24.ru/89374708885tjhtv.pdfIn PDF document text
    • http://delinapod.mypressonline.com/98292278543.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/how_to_change_time_on_nortel_networks_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66f9544f-8325-470d-a543-c07714603334.filesusr.com/ugd/4b2642_62848b78e21f4df4b46d3be73e4b3088.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_dfa926d32254449cbec09a41b9d5c98c.pdf?index=trueIn PDF document text
    • http://residarifuwus.rf.gd/what_are_the_seven_deadly_sins_in_the_catholic_church.pdfIn PDF document text
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_8deccd698be548c49045d6800ebbb57f.pdf?index=trueIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/futag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692db956-162d-4207-b64e-f924bb01385b/yamaha_mg24_14fx_price_in_nigeria.pdfIn PDF document text
    • http://gizamir.epizy.com/rukugomura.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_56a3caed51054b98827a0e3608d8ab16.pdf?index=trueIn PDF document text
    • http://rojaxenutu.rf.gd/who_sings_the_country_song_road_less_traveled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d168e92-d834-4591-ae64-606a7f1e0e9e/hp_laserjet_p2015_printer_warning_lights.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 5380 bytes
SHA-256: 36ff3a041c8a7a86689ce151913028f05223d293c016fd110a05cc744aceb664
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 10336 bytes
SHA-256: ce4f30d37bcd9874a4b011ceda62514575856e44f446fb3765f958f3f1f76bb4

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