Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc3049e38b11ec5…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 10:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7df263397c4b0df1a43ec63a63d524bb SHA-1: faab98c05311ada9d9fa67ef65955dacf8156605 SHA-256: 3fc3049e38b11ec597f36a428f4f6a0828ef801ae31c5cf8842f62d7a527c892
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=autocad+software+costo PDF link annotation
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/85b84e2df996dc.pdfIn PDF document text
    • http://migerov.xyz/teoria_de_aperturas_ajedreznm6j3.pdfIn PDF document text
    • https://rarinuda.weebly.com/uploads/1/3/5/3/135349313/9477846.pdfIn PDF document text
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/fovez.pdfIn PDF document text
    • http://papotupeti.iblogger.org/jowekeket.pdfIn PDF document text
    • https://tataberoxem.weebly.com/uploads/1/3/0/8/130874397/8369765.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/YMh2Wjb/26833267641.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/jxohaia/82777755263.pdfIn PDF document text
    • https://vomanoxugorufo.weebly.com/uploads/1/3/5/3/135331351/vipitimokoki.pdfIn PDF document text
    • http://naturagrush.space/seximudaz8dz01.pdfIn PDF document text
    • http://wosurijegu.22web.org/977228976.pdfIn PDF document text
    • http://dfwshootersupply.com/82414156183lw88v.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/farokavunuxevatuz.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/pefadenobugug.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/qu_elementos_integran_una_composicin_musical.pdfIn PDF document text
    • https://gagejewepaji.weebly.com/uploads/1/3/4/4/134444149/buroxuva.pdfIn PDF document text
    • http://taher-tcac.com/ipod_nano_3rd_generation_case_uk9y71n.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/fotabosoz.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/can_american_wii_play_japanese_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopexetosezulav.rf.gd/cessna_337_super_skymaster_service_manual.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/woxokedokobi.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/papetodipumelubalijo.pdfIn PDF document text
    • http://tijibito.epizy.com/73151516866.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_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 5064 bytes
SHA-256: 0867b97f51385f578b9398db2b0bf447e7ef940246eeb714f9f5c163224b87f0
font_01_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 11352 bytes
SHA-256: 2da3dc9ccc76f39ee3f5162df998f66d1d1392c4362bc66ac820d136b73d2b06

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