Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc77d8a6456c10e…

MALICIOUS

PDF

76.3 KB Created: 2021-06-04 20:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1246210ce57036e2eafad9b0347665a SHA-1: af918c48fcbd382ab98fd2fceeae2bc7bad8cc40 SHA-256: ebc77d8a6456c10e32f1ed3567119099dded5a03b65131ea513a484d773e98e0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure strongly suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/123?utm_term=breville+coffee+machine+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff18101a82a0.pdfIn PDF document text
    • https://fajenususa.weebly.com/uploads/1/3/4/5/134588094/7727945.pdfIn PDF document text
    • https://ruxuxosiforedop.weebly.com/uploads/1/3/4/4/134491380/cdb47d7a8c01a31.pdfIn PDF document text
    • https://kizozadasope.weebly.com/uploads/1/3/1/1/131164448/5956905.pdfIn PDF document text
    • https://xojutezakiveze.weebly.com/uploads/1/3/5/3/135318362/fb8f5ce68.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/8a4685196b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449776/normal_60041d208f73d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493200/normal_5fe17b33cc84f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_602c174d18a4e.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/wegawobinuli-mekadudukeralo-fititufibun-sufafotok.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387411/normal_60b45bef31fb2.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/c5bfb148033a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5fcf76e1c4612.pdfIn PDF document text
    • https://foregizof.weebly.com/uploads/1/3/4/8/134890581/razafer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5ff2a8dc8458f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e047cb3-15cf-4f44-8358-a41c1eb4b8a1/whirlpool_gold_double_door_refrigerator_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aeffb30-67e6-4670-9f8e-45d1c499b084/biforizowapusix.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144505317/the_leadership_experience_6th_edition_publish_date.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/w/file/fetch/144597792/13802951113.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/f/69091724120.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_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 5324 bytes
SHA-256: 0b9a860a93101fa9f4293e0a94d81e456956a319425631e33aa7cae951efbef6
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 11628 bytes
SHA-256: a0004260690b0aad9cd610b945fa8e764791d015342b6e8a92af6383033f6ff6

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