Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b6f50b64eea342…

MALICIOUS

PDF

74.4 KB Created: 2021-06-01 04:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a677d1e609b0c457dea7672829af7008 SHA-1: d7e2c31baf603ce0f0a521798289c0adc02864a2 SHA-256: 27b6f50b64eea34244a03a2135fdc5200a8c729f05ebeaedbc87addd4de879f2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are used in a link farm. The primary URL, https://irlanc.ru/pbw?utm_term=comic+8+casino+king+part+2+full+movie+download, suggests a lure for pirated content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/pbw?utm_term=comic+8+casino+king+part+2+full+movie+download PDF link annotation
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/sedanir-noroderetexit.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4385631/normal_60b0a94b86a3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5fe5a6ee284e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5ff914952e50d.pdfIn PDF document text
    • https://mijonezogiju.weebly.com/uploads/1/3/4/3/134308960/d9b1085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_60663016a7e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_5fd677d9bf076.pdfIn PDF document text
    • https://dezekebewefe.weebly.com/uploads/1/3/4/7/134731304/manigose.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/5585382.pdfIn PDF document text
    • https://femadupimasimu.weebly.com/uploads/1/3/4/5/134594559/310283.pdfIn PDF document text
    • https://pesegoniz.weebly.com/uploads/1/3/4/4/134497823/6116002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_602c681c40eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_6015db09ade59.pdfIn PDF document text
    • https://wiwoxedanin.weebly.com/uploads/1/3/4/0/134012493/binivojifegoke-lojilo-gitoxasavatuja-vinozusunonejul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixugigir.pbworks.com/f/76235403662.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/f/66350136435.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/f/resimli_engel_bulmaca_oyna.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426462/mit_lock_picking_guide.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426027/jeppesen_private_pilot_maneuvers_manual.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/exercice_plaque_de_charge_cariste.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412428/24228657786.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144431856/veterinary_hospitals_open_24_hours.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/malachi_martin_windswept_house.pdfIn PDF document text
    • http://dewubuk.pbworks.com/w/file/fetch/144421458/jasubasosijadabafudekola.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_off0000e1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C4 5924 bytes
SHA-256: 8d97a83fcfab49f2a758dd27e4346027024c5baf09c37ec1c60901e0ebb126a4
font_01_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 11404 bytes
SHA-256: 4ebf938c690ee3f4a208931bdbb714e5ff455edc92756e27a5020338274bad53

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