Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5577ae4e1977b4…

MALICIOUS

PDF

83.5 KB Created: 2021-03-03 23:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a8144015d7bc25db0741a0059f8bbf14 SHA-1: aea025b309c01d741bb32d1b0796e33bf52eb790 SHA-256: eb5577ae4e1977b4a214568aab6b6be96d39ce6070152fdc96d51000991647a4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document contains a large number of embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=dress+down+day+at+work+guidelines PDF link annotation
    • https://cdn.sqhk.co/pujixefan/FZha5B9/56010027600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5fd72a323787a.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/nutrition_menu_el_pollo_loco.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/alesis_dm6_drum_set.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/2626742.pdfIn PDF document text
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/kasadej.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/ieXhjSQ/gebolupugumezafe.pdfIn PDF document text
    • http://hightrade.club/solicitud_ante_la_secretara_de_relaciones_exteriores_para_una_empresa75pap.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/mexoxo.pdfIn PDF document text
    • https://gukudobubutagen.weebly.com/uploads/1/3/5/3/135306914/42fdbf.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/5724217.pdfIn PDF document text
    • https://cdn.sqhk.co/lunabati/eMggqii/best_buy_geek_squad_new_york_city.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_6033f66e43e21.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/vuvadevoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_5fd7ceed7f986.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/bE0hfgc/piano_tiles_apk_pro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fc876e5c1f89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://liroporuki.myartsonline.com/31727142742.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/70844434287.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 5132 bytes
SHA-256: c04601ef8326cd1899f3d0d70e1e08fb1e12c269cdbb79643beb3b4bda677602
font_01_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 10896 bytes
SHA-256: 7f0b9170885b4889d99cff8799e522521d093a7ca5d41e32fbe68c6dac27bd08
font_02_sfnt_off000132cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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