Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3f24829ba1909e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 16:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5f1f15189123af85d2b3fa2e144c0dd SHA-1: 5689b405c2c132ed89503c638b7f9391ddcca052 SHA-256: 1e3f24829ba1909eff776ab60f8025e37b25161725564b026f8e1ec7072636de
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=what+is+the+walden+woods+project PDF link annotation
    • https://cdn.sqhk.co/lalamiteliw/UiclfPz/futawosidupotevigofodaro.pdfIn PDF document text
    • https://kuwupixunipava.weebly.com/uploads/1/3/3/9/133986845/vobapegigelekesu.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/gidDIjd/27897451579.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/dhjeMha/najorukefagago.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/dcjjiha/vepajulugisejudulakidada.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ijhg6rB/how_to_beat_donkey_kong_mine_cart_carnage.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/dU3iaON/the_crossings_premium_outlets_coupons.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/8716f547.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/baf6f178b949.pdfIn PDF document text
    • https://cdn.sqhk.co/mimotulifoti/GjgCSHD/murefatabasedivilo.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/OEnjcxy/96467316337.pdfIn PDF document text
    • https://nivebisela.weebly.com/uploads/1/3/3/9/133997547/2763689.pdfIn PDF document text
    • https://cdn.sqhk.co/zigimovovu/ibbKibw/95616164099.pdfIn PDF document text
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/zunop_fawupixawore_xuvufinado_walowufisoza.pdfIn PDF document text
    • https://fejawizekojiwi.weebly.com/uploads/1/3/1/4/131438151/7566481.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwuzasemifo/chisP1C/picture_perfect_crossword_puzzle_103.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/8862941.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/yianib2/desserts_word_search_puzzle_answers.pdfIn PDF document text
    • http://linogozajasupe.22web.org/quadrilateral_area_and_perimeter_worksheet.pdfIn PDF document text
    • https://jaluvipuruwagub.weebly.com/uploads/1/3/4/7/134734890/3e9a664f50be.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/jihlFhh/tumblr_lights_words.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamekukibudinos.epizy.com/calligraphy_writing_tutorial.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_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 5344 bytes
SHA-256: d8372cddd0f9b138eb8912aee4b60afe9adb8dbb343c51b71cc076904130f375
font_01_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 10652 bytes
SHA-256: 057b0b62be0e897b6119b047312d0b0bd01432f39fefe69c8685c347de02e663