Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa30fdaf6b6f67cd…

MALICIOUS

PDF

85.0 KB Created: 2021-04-03 15:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: af2abe12434f7026d6d2470881917642 SHA-1: 442822181b0a21cc696e903095475f739f3fc692 SHA-256: aa30fdaf6b6f67cdfb68a8552be4a754d28928d83b08dec1c81e64bc93a2b80d
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/strik?utm_term=how+to+reset+prius+maintenance+light+2005 PDF link annotation
    • http://xojerodisus.22web.org/total_war_warhammer_2_dwarf_building_guide.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/potepivafobizi.pdfIn PDF document text
    • http://bomufofo.iblogger.org/visual_basic_excel_2020.pdfIn PDF document text
    • https://maxawoxemun.weebly.com/uploads/1/3/4/6/134615094/bimuj.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/xapafexijatixiru.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/6613594.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/9231901326.pdfIn PDF document text
    • http://nuzenurego.22web.org/rifalam.pdfIn PDF document text
    • https://xakuwije.weebly.com/uploads/1/3/4/3/134340554/704be4.pdfIn PDF document text
    • https://vibofigejud.weebly.com/uploads/1/3/0/7/130740502/mobolutar_falijavaw_kajuwuzadurib_rizunowomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://buwozefavimim.epizy.com/ruraxuzukon.pdfIn PDF document text
    • http://nonavijewiw.epizy.com/bezasizine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0560cc-e4c2-4238-a2a9-bc426edee64e/honda_generator_eu3000is_vs_eu3000i.pdfIn PDF document text
    • http://bonezulaw.rf.gd/editable_table_plan_template.pdfIn PDF document text
    • http://jixojamut.epizy.com/11199143192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45c4c32-7044-4da5-ac64-625cc856fa14/who_moved_my_cheese_quotes_images.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/jumpsuit_for_wedding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cac3ea-d4e3-43be-91ee-8f767e8c286e/big_fish_audio_momentum_sampler.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/62559418610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13c6a03-d509-47a4-864e-5e13b80a8c27/jovavonupa.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/84035446240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2307995a-8fec-4537-8959-84bb6bfe56bb/sri_vishnu_sahasranamam_telugu_mp3_free_download.pdfIn PDF document text
    • http://papemekibe.rf.gd/30253148100.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 5796 bytes
SHA-256: d1da617e535dc6467a6e7521f7126661d7c24616b79fa3fac0635b507b593af7
font_01_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 6640 bytes
SHA-256: 2da83060ad210a9a1743b04a22b2cc5ebb14ba7af64fbaa5f25da2d26a1b3d84
font_03_sfnt_off00011ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDE 11304 bytes
SHA-256: 4022cdbba73bb15d31143460049037e137dda7aa5c142dd2d0649b101430d275