Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e8fca9b36b280d…

MALICIOUS

PDF

72.4 KB Created: 2021-01-28 13:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b5c0672d2b89081df10fd2c4dfbb9c48 SHA-1: 87c2bfad5a4295e32b144165b647fd258de62999 SHA-256: 49e8fca9b36b280d9fa72ad0f0738236f82c086afc77dbc963101e0f4def8022
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/shook?utm_term=birthday+lyrical+video+maker+apk+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff36126e51c1.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/97635347904.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/awjdCuP/67733347971.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/9Z2agbh/6530896746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5fdd683faa3ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fdf339a23c19.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/jdsWjfl/rpg_maker_vx_character_generator_online.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/peledize_lulifap_lexezidu_giporezefew.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/felogak.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/a1SstKr/50354181730.pdfIn PDF document text
    • http://vifijes.22web.org/51309549352.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/jbtFidE/vubutisolijovewonurolazof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fee7d5edf8bc.pdfIn PDF document text
    • https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/razezipizoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulonojaminipe.rf.gd/strona_bierna_angielski_wiczenia.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/94237710137.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/zimigega.pdfIn PDF document text
    • http://vininotubosom.epizy.com/jonowis.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_off0000df39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 5504 bytes
SHA-256: 300769515090471438fffb5138087280dac5ba6a894b1d3468a5d4388ee6d626
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 10216 bytes
SHA-256: 84a3a2888dbe56cb5be8954cf714870167564ae1eb0e9e55659cf2ff14419c1c

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