Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5756350e79fea9…

MALICIOUS

PDF

72.8 KB Created: 2021-06-06 23:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a54d8cd0e2bb0e89c73cf7e275da66e7 SHA-1: c1b0b5a0fa4addfe4465814dd6415181f7c74fe5 SHA-256: 4e5756350e79fea9d8dad32e404cafa0937010e2648739c9c095abae5545e1f9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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 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://pixomot.ru/pbw?utm_term=rockshox+monarch+plus+rc3+full+service+kit PDF link annotation
    • https://torurukiruxo.weebly.com/uploads/1/3/4/5/134529807/3151782.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/logowa_tifopisotopujeb_xokotapebogalit.pdfIn PDF document text
    • https://razizarapijesi.weebly.com/uploads/1/3/4/6/134640591/9091558.pdfIn PDF document text
    • https://fewabobur.weebly.com/uploads/1/3/4/7/134713859/rimoritew_vosipekutisuvob.pdfIn PDF document text
    • https://ximabetewu.weebly.com/uploads/1/3/1/3/131384229/morat-lujumivex-mixemolal-nasowuvisexo.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/2996386.pdfIn PDF document text
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/6ac38b0eb.pdfIn PDF document text
    • https://wogifirum.weebly.com/uploads/1/3/1/0/131070377/dopanag.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/zigovewa-tokiwa.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/fugizofabadobin.pdfIn PDF document text
    • https://kajaseje.weebly.com/uploads/1/3/7/5/137507408/mojodiwuditefup.pdfIn PDF document text
    • https://napifilimikap.weebly.com/uploads/1/3/1/6/131606974/sojinojimijepuleku.pdfIn PDF document text
    • https://ruxiwinovisas.weebly.com/uploads/1/3/5/3/135313790/xuzuvapekemovumenot.pdfIn PDF document text
    • https://ratowoxure.weebly.com/uploads/1/3/4/5/134584599/8449874.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/53e4f4104fa58f.pdfIn PDF document text
    • https://nurowilalivep.weebly.com/uploads/1/3/1/3/131380447/sowofovarine.pdfIn PDF document text
    • https://xuwudavalibabiv.weebly.com/uploads/1/3/4/3/134321130/2072691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedufid.pbworks.com/f/99908700949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c8e5e2-4af1-45e1-b9d5-2ab8ee5896ae/swiffer_wet_jet_pump_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18da70f-2143-4927-a96d-90a4a5ecffc3/electrons_in_atoms_review_sheet_answer_key.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144423126/diep.io_mod_apk_unlimited_points_1.2.10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f26764-01e7-40d4-994d-3e351e01a1b7/aspiracion_de_secreciones_bronquiales.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144485769/blithe_spirit_noel_coward_play_script.pdfIn PDF document text
    • http://jowukon.pbworks.com/w/file/fetch/144648207/fimon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb53554-603c-4ed9-b619-13ac40b1259f/download_stand_by_me_doraemon_full_movie_english_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a1cf93-1f6a-4e06-aaa9-99fdcaf734b7/76947989625.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/ejercicios_proporcionalidad_repartos_y_porcentajes_2_eso.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_off0000dc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4A 5616 bytes
SHA-256: 50f039f09fe744fd1ed66799e6093e905c6f97df3d4264406b609e76304bdef1
font_01_sfnt_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 11316 bytes
SHA-256: 2e0d13edccf50d94d97da8d746b4b30e7c84687d946d3cc22825357a7a6704c7

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