Malicious PDF — malware analysis report

Static analysis result for SHA-256 83480b59460415f0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-08 18:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bc5f31df54fd2fddd2b8950582de613a SHA-1: 7b02e56f8ab82e4bedae92b7e40d964c4b7764fb SHA-256: 83480b59460415f02af270b10a40f5e9fff6e9eb25252500a05a558c41b79600
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, indicative of a link farm designed to host phishing or malware distribution pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=love+ball+game++for+pc PDF link annotation
    • http://tisimewifexumi.iblogger.org/12311687399.pdfIn PDF document text
    • http://bottlechainworld.com/420620602957t10f.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/bagusabonoravorozafe.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/8550284.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/hitchhikers_guide_to_the_galaxy_book_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/nPanif6/nipelalalimedexazufevis.pdfIn PDF document text
    • http://naderuromopuru.22web.org/jspdf_autotable_header_font_size.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/samsung_aquajet_vrt_washer_error_code_4e.pdfIn PDF document text
    • http://islandlandscapesbb.com/940141733409lttv.pdfIn PDF document text
    • https://cdn.sqhk.co/xomatujod/hd3rgcM/zukugenotinirafijovi.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/Z5SfihI/33800060958.pdfIn PDF document text
    • http://fb-copyright-help-from.com/psalm_23_vs_5_commentaryy0mr1.pdfIn PDF document text
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/7508070.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/UOAzhjf/hockey_gear_for_sale.pdfIn PDF document text
    • http://thrivewebs.com/fodivekidatln7yi.pdfIn PDF document text
    • https://cdn.sqhk.co/nubowolimit/aV3iihc/tapekopekubaxer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zinanasi.epizy.com/81072231280.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/lisoxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dab6fe-d177-4e3f-861f-774e62b5b0df/what_is_the_fastest_way_to_solve_a_rubiks_cube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f5094a-c3a5-48de-baf2-fe6df0171862/wuwowopavotigekojalepuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a21d760-45e8-40de-83cd-5effa7f0aba3/sharper_image_bluetooth_earbuds_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bcd4f1-b8f3-4192-a85c-79d8484a2e07/bluebook_legal_citation_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d37e3a-807a-4cef-8c0f-72c078a09ed9/97175930537.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/44866499950.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_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 5300 bytes
SHA-256: 8ed342f8c303c28d9b44728c10cda88eeb69e807482032dc609af988d948ba26
font_01_sfnt_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 10816 bytes
SHA-256: bd618f741a779b21b9c1c1d7d680e3453535e0ad4633bd88c9e70186ee50bc8e

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