Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e497e11a8d1612…

MALICIOUS

PDF

74.3 KB Created: 2021-04-05 10:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 13d694f9ecacbde077fd77bc901c2aa4 SHA-1: ca3a29525bbf11e0d19027a23e1bd040a24d6be5 SHA-256: 53e497e11a8d16129f53635b0d3d9eb3fbd6352350e40a5d7e3c1ca280ec483a
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, with several identified as redirectors to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users by directing them to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://dafemum.ru/123?utm_term=ribbon+banner+vector+free In PDF document text
    • http://murimubijejaba.mygamesonline.org/expanding_tactics_for_listening_third_edition.pdfIn PDF document text
    • http://gesamakim.22web.org/43454126242.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/muscle_fitness.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/pdf_creator_sourceforge_full_download.pdfIn PDF document text
    • http://xifutipixa.mywebcommunity.org/golegosalala.pdfIn PDF document text
    • http://razvivatel.blog/83230690973iol2z.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/figexijenebisugezewedawu.pdfIn PDF document text
    • http://mijogunabisojil.iblogger.org/aspirator_nazal_manual_chicco.pdfIn PDF document text
    • http://bio-ita.fun/tudakidvh2y.pdfIn PDF document text
    • http://dwatches.site/daniel_plan_intermittent_fastingf91xb.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/2085860033.pdfIn PDF document text
    • http://wordsideget.top/english_books_for_kidsy56u3.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/jabanulepixuworirev.pdfIn PDF document text
    • http://pushbiz.fun/zubedaprhmn2.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/25825022589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digifasofow.rf.gd/57233560640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0552e9e2-732c-4fda-9fe0-c9d61219c389/68883895652.pdfIn PDF document text
    • http://bugamaxu.rf.gd/nerasezesunomivusazazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e73cad-521c-47f7-8bd0-781cbe19e72e/duzaxikuwigewanepep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b419424-a040-41be-811d-7bccade7df7d/miniature_dachshund_puppies_for_sale_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e657844-04e7-4f10-a73a-b0bb3a40a6f8/kaplan_ged_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b6a1d2-83e0-4ac9-9a33-2baa1e77caea/dewoxuwivome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0b0b4d-a3e6-4b50-aa64-06815bb51960/tips_on_writing_academic_essays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81259e1-87a4-4283-8f07-0971636bebbb/pidutelibebadupet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16A 4872 bytes
SHA-256: 818236a103f0ac87cf38feabe009b2a67de562407f14f6abfbb8da0486d66585
font_01_sfnt_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 10704 bytes
SHA-256: 038ced99ffd46ef93ea5b6389998256a2cb3e41ba287ebe3290e5e3b92bcd756
font_02_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 16448 bytes
SHA-256: bc6d684f813ac1c32be8bd0fe15b7813cdddcd900b6f98dcbbe4bb93017ec79b