Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22a1eb720be322b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-28 22:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4d347263045b9d28098fb2470c9d996e SHA-1: ff9be7ef5ed940caff7e0792daabcd0c930fbec4 SHA-256: e22a1eb720be322b6ce5c18e62d7de5c8cca91957d7d1b8f4d8fe95926fefcb6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect 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 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://botokaw.ru/wix?keyword=what+are+corn+syrup+solids+used+for PDF link annotation
    • http://dabosesavedevet.medianewsonline.com/zopabezekewazid.pdfIn PDF document text
    • http://fb-ig-copyright.com/262575929221qlgg.pdfIn PDF document text
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/6933025030715b.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/82026580550.pdfIn PDF document text
    • http://uscarins.info/videoscribe_pro_apkpurenjj3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_60450a952d673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366063/normal_6004ccb361688.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/anticancer_activity_of_lemon.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/misuxavufo.pdfIn PDF document text
    • http://vojituvidur.iblogger.org/free_will_template_michigan.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/descargar_biblia_de_estudio_reina_valera_1960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_6008b12adca0a.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/2593951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fde657a85cbb.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/2604b81a-13f2-4454-9d77-c6c386607ab2/bezirubej.pdfIn PDF document text
    • http://ribaxexumipo.rf.gd/kala_dj_song.pdfIn PDF document text
    • http://somifisuvukibuk.onlinewebshop.net/xiwinawewawusigajofuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b819a12-4bb0-4bea-ba08-1c2b15c9b631/gudelemolizigedabijilage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41c5a50-4056-4e4d-8841-db7831e734a6/sotidagoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07587bdd-6192-40ee-ae0e-7965e941df1c/96086428806.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5360 bytes
SHA-256: 5ab93d655289f09c5953247f83ab2c9deb205641bcd9d8d6c8bbde13d1db4a47
font_01_sfnt_off0000fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 11188 bytes
SHA-256: 4ea9b7b5afed9df2bc2b5879fed8d4def8ea1f1921dcb23a0da9e407920b8782

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