Malicious PDF — malware analysis report

Static analysis result for SHA-256 99189bdb7df3f49a…

MALICIOUS

PDF

78.0 KB Created: 2021-06-06 06:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: be7ac6ee12b3359874f62fe219e2974b SHA-1: 937fbf1979d32bc42fae12e53732dd6fdc3f197c SHA-256: 99189bdb7df3f49a22c6ee3ca9bf11f7300e63a8c8b7f66fcfc5aa05b43e4b84
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/pbw?utm_term=como+eliminar+manchas+de+tinta+en+plastico PDF link annotation
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/8085269.pdfIn PDF document text
    • https://wilexezixokesu.weebly.com/uploads/1/3/4/7/134764798/30943371b19e6.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/f3efb66aba775.pdfIn PDF document text
    • https://mukoxawav.weebly.com/uploads/1/3/4/6/134627731/roxuwatur_ritidopepijuki.pdfIn PDF document text
    • https://wokiliga.weebly.com/uploads/1/3/0/8/130814475/xuvezazelu-fokitewefojixu-sixexap.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/28ab0369bee7077.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/2715128.pdfIn PDF document text
    • https://nanavirirexam.weebly.com/uploads/1/3/4/4/134474519/acaad68278e57bb.pdfIn PDF document text
    • https://jitedutakawu.weebly.com/uploads/1/3/4/7/134712839/1011811.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/fanozujo.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/5647978.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/vijere_rarotibuxozow.pdfIn PDF document text
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/8134956.pdfIn PDF document text
    • https://tavoledunu.weebly.com/uploads/1/3/4/7/134708600/7608444.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/0ef26dab-e836-4adf-9a75-9bbe4e359f8f/sududizikotuputewesurobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee85685-e626-4cb6-8341-57a4c810306d/delinidetisunegewaletisoz.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/w/file/fetch/144455946/22634447720.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/divanagijobuduwasaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a572d8-edf2-4b29-bd13-ec5ca42a24de/88673640051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74473582-ce6f-4b63-b3cf-48994db8fdd7/tecsun_pl_380_manual_portugues.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/w/file/fetch/144660048/samsung_sdr-b74301n_factory_reset_with_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a944fb03-a066-4e09-b880-c914a9156257/nikikezugogikeregemoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba02d405-40e8-4010-871c-687077767be7/what_true_love_is_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb11f44-fcfb-455a-8976-97101f693de0/duvomezarurilijarikizu.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144442122/how_much_oil_does_a_16_hp_briggs_and_stratton_engine_hold.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_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5220 bytes
SHA-256: 55284dfe15c432511336453a9021a33940fc43885458d4b15b38eb98e7e7055e
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 11432 bytes
SHA-256: 304798ef70bd7e964a2e085158f0fe1329d2caea4195afc042f86b12ba4d23e5

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