Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc4dd4245338efe…

MALICIOUS

PDF

70.8 KB Created: 2021-03-03 04:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fd6b28344e4ecbe64ee1fd5eb3b8a9dc SHA-1: a3f45c87efc37ece560c2b7bdad55d59b8f7260a SHA-256: 9dc4dd4245338efec7b1c0272829512e6eebca9a6293f788629cd9b76e7e6138
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://mezovuduw.ru/award?keyword=sonic+sausage+egg+burrito+calories PDF link annotation
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/gonosoto-jofokido-digojuzad.pdfIn PDF document text
    • https://xebuwonivaxatev.weebly.com/uploads/1/3/2/6/132696015/fuvili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_601cb2eed86e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_601a33258096e.pdfIn PDF document text
    • https://bupagaxeni.weebly.com/uploads/1/3/4/7/134706040/xeribexawe_gilefawewo_siditovibubodo.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/gipxgh7/1203044889.pdfIn PDF document text
    • https://rurezakofone.weebly.com/uploads/1/3/1/1/131163981/jovipumosud-vidizarinipetog-ruwol.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/iaijgea/simcity_buildit_hackers.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/aPKZjaH/best_cowboy_boots_to_buy.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/gofutenazi.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/7hf3Bjh/kuxiwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5ffdffd7b85bc.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/EBuBhbM/i_am_innocent_ios_cheats.pdfIn PDF document text
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/nozok-fesonulazulek-woluwi-ruvavi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinezedu/bride_of_the_century_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/a_safety_data_sheet_consists_of_16_sections.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/s_f_u_full_form.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_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 5208 bytes
SHA-256: 1da64be45d847d37093488805a391187fabf50f502903ed203640706c8189e25
font_01_sfnt_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 10240 bytes
SHA-256: f831e18b52c4f57e28e0a1961e7edbe7f2b683c296f730a2e8ff0ddc73fb3c51

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