Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49657637a27f903…

MALICIOUS

PDF

85.4 KB Created: 2021-03-22 04:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9b5bc762440d62f7d3533a7d4fb5685b SHA-1: deb3181af65f019daa5c8699410a59dbe0b23d8d SHA-256: f49657637a27f9034ec5b8e45b4606a2eae40596b7bab250788d26adda1ba106
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs, such as 'https://jumiwimov.ru/123?utm_term=pink+performance+brit+awards+2019', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/123?utm_term=pink+performance+brit+awards+2019 PDF link annotation
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/kovezevifunadad.pdfIn PDF document text
    • https://sazizilas.weebly.com/uploads/1/3/0/8/130874530/5892477.pdfIn PDF document text
    • http://kovafuwir.getenjoyment.net/tasazukavejidiba.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/frankenstein_play_script.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/97239505642.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/besadew.pdfIn PDF document text
    • https://nojezedefefowas.weebly.com/uploads/1/3/4/7/134762002/5146216.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/8427598.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/91406170310.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/xemuwonirupuxaxipo.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/da0d2.pdfIn PDF document text
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/8953990.pdfIn PDF document text
    • https://bisomimimuj.weebly.com/uploads/1/3/4/5/134526732/ziloreronib.pdfIn PDF document text
    • http://mokugujumekov.sportsontheweb.net/28030803521.pdfIn PDF document text
    • https://nutapezuzuf.weebly.com/uploads/1/3/0/9/130969421/8f2eff791080.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/who_is_the_founder_of_mathematics_in_india.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jobavo/coronation_balanced_defensive_fund_p_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678bb7ee-20ba-4a17-be39-e497e3082dec/practicing_the_presence_of_god_audio_download.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/as_bill_sees_it_page_45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ec302c-b7e9-4a34-b7ac-df3c958f4328/91839437840.pdfIn PDF document text
    • http://fogovulosuzan.onlinewebshop.net/xuwepesidibuwibobafuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b77f3d-c1f0-4142-86b9-71ac7b69ad8e/liratalawatufiguwoxeju.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/3514350850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0cf7164-30fa-46df-9c22-7b033fa882f2/maytag_bravos_quiet_series_300_code_ld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d4e9b4-c181-4b50-8654-bfddb7218e9c/how_to_make_dunkin_donuts_boston_cream.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 5836 bytes
SHA-256: 81f792f40d6b0c0e7a20b015526ee152ccabf8962ce2ab2e5fc0bf1a5b8be9c2
font_01_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 11020 bytes
SHA-256: b62a9dd36acec3967c7c2c698791d577ddaee7ccb25d3dc22bfcf234d9c3f389
font_02_sfnt_off000139a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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