Malicious PDF — malware analysis report

Static analysis result for SHA-256 47348b5ddfd4cbd1…

MALICIOUS

PDF

68.7 KB Created: 2021-03-01 04:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 825b3a026720b0147af7086b30babba6 SHA-1: df844bef4f86b0973b5f00658511f9c073392242 SHA-256: 47348b5ddfd4cbd153a5117d78ed3359733bbe4a3fa0fc47426189247609867e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs point to various domains, some of which are confirmed benign, but the overall pattern of a link farm within a PDF is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://druttle.ru/award?keyword=baofeng+uv-5r+plus+two+way+radio PDF link annotation
    • http://fc-aromat.ru/the_art_of_rick_and_morty7day0.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/8609e979af56.pdfIn PDF document text
    • https://novomegaweg.weebly.com/uploads/1/3/4/7/134738931/lokakoxamuve.pdfIn PDF document text
    • http://topshops.website/criminal_law_definition_simple8ni24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ff786a1ce701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff40293395b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461748/normal_5ffe9bebad98c.pdfIn PDF document text
    • http://toportt.online/free_act_practice_test_2018k5yrq.pdfIn PDF document text
    • http://freds.space/tozebolekufiromgyjot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403680/normal_5ffe8d5c355f3.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/78075511662.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/jekowunirasuxurav.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/73223828783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fee819a6f57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fe862ebdcc43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radujexoxetapil.epizy.com/bhaiya_ji_smile_video.pdfIn PDF document text
    • http://rasijubesu.epizy.com/cg_vyapam_pat_2019_answer_key.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/52848810628.pdfIn PDF document text
    • http://pokepus.epizy.com/rigol_ds1102_review.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/emerson_mini_fridge_with_freezer_troubleshooting.pdfIn PDF document text
    • http://fonobufusig.rf.gd/dell_latitude_e7450_drivers_india.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_off0000cedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 5668 bytes
SHA-256: 2d7ae118536c49b92fca3a6c6b65e79449a032d843aa95cd99cede9ad916503c
font_01_sfnt_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 10324 bytes
SHA-256: 77dba62162d27c2707367ad57c50aa0fde9c4374d641045532c64734dd7952e5

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