Malicious PDF — malware analysis report

Static analysis result for SHA-256 7094f5e06f986b0e…

MALICIOUS

PDF

70.6 KB Created: 2021-03-25 13:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a509d9013666ee7af0a9e30e8ed19a26 SHA-1: 15a97a96817c00089cc78a4992d6f0f95ef439c2 SHA-256: 7094f5e06f986b0e86546f1f7917888e3987dd24692fdd7d377a726e55597493
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=3rd+conditional+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5ffab5d63819d.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/dipusatinalaveka.pdfIn PDF document text
    • https://fopulowaledini.weebly.com/uploads/1/3/1/6/131637921/9882560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_6021a320eb581.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/5bd2b455aa.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/1249329.pdfIn PDF document text
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/0a04a001f.pdfIn PDF document text
    • http://tefozunamosolo.iblogger.org/38103064824.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/vopube-tufozina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412570/normal_5fdcf14c3dd7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ff3cc8ec1998.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/291f278e-8092-48b3-beff-d6efd8eec472/best_book_on_chakras_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a61ed0-d96d-4ae1-ba6b-7722c85dcccc/pimatavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1d30b7-6e1e-4529-bcf9-683bba79d81d/why_wont_my_bella_deep_fryer_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4286d696-0b43-43f5-a469-3ac6f811505c/how_to_get_a_replacement_drivers_license_in_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fb3174-f4de-4c79-a3bf-899f7439d119/how_to_write_a_narrative_essay_and_example.pdfIn PDF document text
    • http://tenavugonotaj.rf.gd/consonant_blends_bl_worksheets.pdfIn PDF document text
    • http://magajavopisili.epizy.com/94828144269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac288001-73d7-4b26-a3c7-d609a686e925/how_does_rf_lash_boost_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1e5c47-4567-487c-a535-15df6f5e5177/budonitiw.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/ginil.pdfIn PDF document text
    • http://pawubiba.epizy.com/jumble_puzzle_answers_8_16_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b746ca3-040f-40fa-95b2-7667fe4f7dcb/frigidaire_fghb2866pf9a_ice_maker.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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 5284 bytes
SHA-256: 9450dede148e95e2bc4007ba89042de3833da3052b482cc5901d2b2d17a967c4
font_01_sfnt_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 10672 bytes
SHA-256: b189102890088755d6b745db83250ea6312f934270fcaabc1c93623f9e9c6693