Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0472a0a3ec34c4…

MALICIOUS

PDF

87.1 KB Created: 2021-03-30 15:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b644dc856097a2445e5fdbd4a832cba SHA-1: d61597037bd32e1f158d332622eb324eb4e49cfe SHA-256: 5e0472a0a3ec34c4d5fd5bcd101bba8972ec7ae982cf1582567b3a6f979ca90d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://resalured.ru/123?utm_term=punjabi+attitude+status+for+whatsapp+video PDF link annotation
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/1bb2b42.pdfIn PDF document text
    • http://1xbet-regi.site/word_search_books_for_adultso3jtr.pdfIn PDF document text
    • http://ewwe.space/pokemon_unblocked_games_weeblym5ztf.pdfIn PDF document text
    • http://bonmarket.site/60565944236lyzn5.pdfIn PDF document text
    • http://rocketdocs.us/beautiful_liar_videopfn1p.pdfIn PDF document text
    • https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/c670d78b38b6.pdfIn PDF document text
    • http://dopelozaf.22web.org/breast_cancer_ppt_template_free.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/limovo_buwoludosele.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/mopoba.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/tonemakopinibem/sibezobejivive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46a598b-b065-43f8-be3d-0c6f2a5a52a5/brs_gross_anatomy_2018.pdfIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_1d32cebfa610414da4939ec48d415f93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0276df4e-5984-4ef4-aec1-f21802f59945/3824978468.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_58f8aad496404ec99f078e21cf5f7aa6.pdf?index=trueIn PDF document text
    • http://zinezalidoratov.rf.gd/microsoft_access_2007_tutorial_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5ef769-766a-4bf7-9fbd-e8dc3ca77540/how_to_set_stopwatch_on_casio_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b66771-9d85-45d3-85b1-332dbe5f84eb/65461611179.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/integral_calculus_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/27521639084.pdfIn PDF document text
    • http://nokubivuva.rf.gd/9996241756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cecc35-1319-44f7-9934-b9a9f4bf5ac3/rosibovekedojogenusumin.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/fapikitesofefan.pdfIn PDF document text
    • http://zatunikepozis.epizy.com/caries_dental_tratamiento.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5348 bytes
SHA-256: 2e1a61043125c76201dd6e07a3527ebdf00620c861fdb55b3b3099b9c6b43fb1
font_01_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10804 bytes
SHA-256: 0cad1b72762eef86c3ad7030b90d2fe099ea7264d92bfc690bbe6662cd4cf0d5
font_03_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 16972 bytes
SHA-256: ac95bc1fb7913b0f3e701e2cd077342a8b2a32d952daa6b019ca4cb845d5ea36
font_04_sfnt_off00013fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333