Malicious PDF — malware analysis report

Static analysis result for SHA-256 7628e96e5961768b…

MALICIOUS

PDF

76.7 KB Created: 2021-03-16 21:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 785b46a3014ed5055177d6dfb4c6e8d9 SHA-1: 5e77a6ef9126455c6a0ebcf946d955353ee2cb5e SHA-256: 7628e96e5961768b2cb753de7f719d51c72410d741c01d0fdc34b57ee3a702c5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://zajinet.ru/123?utm_term=bus+stop+movie', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to deceive the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/123?utm_term=bus+stop+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465690/normal_6021030669224.pdfIn PDF document text
    • https://relitemora.weebly.com/uploads/1/3/4/3/134352419/cff15838c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fe58b8116d76.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/tibed.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/8467231.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/what_4_nitrogen_bases_are_found_in_dna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409248/normal_600403ee9cc06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5ff691952fc6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_604ce08b277b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fe4a4f76afd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_60348d7310da2.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/69523508592.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/f17934a5-bb53-4e6d-8ee0-0cf306adbe22/lexile_correlation_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7216d48-796f-48e3-864f-54795af45b3b/how_much_is_hp_officejet_pro_8600_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ab46ff-4c03-4ade-9381-96f3502afc74/listen_music_appreciation_textbook.pdfIn PDF document text
    • http://jimarol.myartsonline.com/24388262008.pdfIn PDF document text
    • http://josisuvo.epizy.com/britches_full_of_stitches_fiddle_sheet_music.pdfIn PDF document text
    • http://rigawumitod.rf.gd/blueprints_ob_gyn_7th_edition.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/lubiveziwinukanun.pdfIn PDF document text
    • http://vawibafutij.rf.gd/vavolemasasizama.pdfIn PDF document text
    • http://fekejuw.atwebpages.com/rotilupufoxujuburoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73352f3-ff6e-4b75-8a27-195af73f72e0/32724725141.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/indian_camp_hemingway_analysis.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_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 4736 bytes
SHA-256: 05152f93cc109c6fa48c9334029ffd51d796b554bac7f34ce08bb725bdd8777e
font_01_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 11144 bytes
SHA-256: 2c1767684a275e06236f0dfb5285d3c7ad3a20ecd9be1b7831263ac4a6869c61

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