Malicious PDF — malware analysis report

Static analysis result for SHA-256 001073a9f088695a…

MALICIOUS

PDF

77.1 KB Created: 2021-04-14 15:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e40386f290cd811ef597dd68d5a0adc8 SHA-1: b80196ef1aceadd12131436eb6909f1c7b727e00 SHA-256: 001073a9f088695ab3e3bae5f1e07fd3b223c12033a9bda83a8cd25b97983cfd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, 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 are indicative of a phishing or SEO manipulation scheme, likely leveraging embedded JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=what+is+a+good+hobby+to+do PDF link annotation
    • https://xenesadu.weebly.com/uploads/1/3/0/7/130739949/7740477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_60438b80dc6d7.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/3918484.pdfIn PDF document text
    • http://tazanup.mypressonline.com/analogy_reasoning_in_english.pdfIn PDF document text
    • https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/xiwelenola.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/degotajugopo.pdfIn PDF document text
    • http://zanapipok.getenjoyment.net/bocio_coloide_nodular.pdfIn PDF document text
    • https://pewofofuvalok.weebly.com/uploads/1/3/0/7/130775386/9595606.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/3a265efd560569.pdfIn PDF document text
    • http://cmbclientes.com/emiway_bantai_machayenge_video_song5y1kp.pdfIn PDF document text
    • http://regsenatvumen.website/254147455132mqes.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/668803.pdfIn PDF document text
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/kesunowawilubupumo.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/pofofojudoku-sopage-nuxedebi-sarufadarog.pdfIn PDF document text
    • http://triple-doska5.club/strategy_training_courses_in_nigeria_for_20192v36u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_604139336e7e8.pdfIn PDF document text
    • http://m-ryanaf.site/3821789511177hdp.pdfIn PDF document text
    • http://aydym.club/brandsmart_usa_dadeland_miami_flwyfzr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484114/normal_602646987b7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_6022a98b97aa6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 5212 bytes
SHA-256: b15fb287a146c3773f5484a5f33bd626fc21c34c8785c19f3009c05b82b85005
font_01_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 10604 bytes
SHA-256: 6060978b12deea1ac519cb19ab8f0542575402fd68356f886426775349c38d57

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