Malicious PDF — malware analysis report

Static analysis result for SHA-256 2657d58988e39fc3…

MALICIOUS

PDF

83.0 KB Created: 2021-03-09 13:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 02d09f18e07fc97b3356b4c955e2ddd9 SHA-1: 184e1d0abea451d741e79f81dc1a38a2407ac364 SHA-256: 2657d58988e39fc39af36d47388f7414c988078f67b034195365f7fbc0ae13d9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xezojetit.ru/wb?keyword=salesforce%20admin%20tutorial%20for%20beginners%20pdf PDF link annotation
    • http://depupejaxidolip.22web.org/bootstrap_3_form_inside_modal.pdfIn PDF document text
    • https://gasatuba.weebly.com/uploads/1/3/4/5/134596028/nazezozogu.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/kijamowukif_dufuxugozasif_lefoloremez_pitexe.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/mifasipe-gezajazukipise-mojovasoris.pdfIn PDF document text
    • http://jotijitod.66ghz.com/the_personal_mba.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/gorikurit.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/legefamovusezif_voluwefoli.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/purojigomadazomifaw.pdfIn PDF document text
    • https://ziloxewimufe.weebly.com/uploads/1/3/0/8/130813797/diradu-nupurasa-rojebeditenugif-nusiguwebap.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/bigosan_ribasoralive.pdfIn PDF document text
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/9023306.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/xexomepakerozobakaki.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/gumming_sheet_dealer_in_delhi.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/82305519172.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/zaverame.pdfIn PDF document text
    • https://serabonileraso.weebly.com/uploads/1/3/4/4/134444783/tobafuwafesowidi.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/vumixap-nufikovufamote.pdfIn PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/129564cc2.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
    • http://fufabufitilaf.epizy.com/89702165248.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/carol_of_the_bells_pentatonix_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/does_green_tea_flatten_your_stomach.pdfIn PDF document text
    • http://bikufupok.rf.gd/android_textinputlayout_error_background.pdfIn PDF document text
    • http://banugigo.epizy.com/crystal_report_viewer_browser_compatibility.pdfIn PDF document text
    • http://pukexisigezome.epizy.com/kuzawefikatuvefiludu.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/lizebukaxunoto.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/guidelines_for_dissolution_method_development.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_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 5600 bytes
SHA-256: babd907e55a53bc32bd908ed892d6ab0749c9f5b1f7cc9c606bfdd9fb68d2678
font_01_sfnt_off00010a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A92 11080 bytes
SHA-256: 16f9af149ff69fabcbad930df71a78fc1c319750498bc98132f9c5fe7ea44e44
font_02_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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