Malicious PDF — malware analysis report

Static analysis result for SHA-256 3212886eb3b85e35…

MALICIOUS

PDF

123.9 KB Created: 2021-03-14 07:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a21767905a9cf5d3b58ab379dae039e4 SHA-1: 449bf652374fc31d7a33de3c4d5828403f38b25f SHA-256: 3212886eb3b85e35d438a64e66596fdbf8c1d73f393ebe38be71afae7486699b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://xajibur.ru/award?keyword=neufert+anthropometry+pdf PDF link annotation
    • http://tufodudem.mypressonline.com/how_much_does_it_cost_to_replace_a_catalytic_converter_toyota.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/laferavudokanejuborotuj.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/possessive_adjectives_explanation.pdfIn PDF document text
    • https://cdn.sqhk.co/sirezozere/iaje6hb/45111215067.pdfIn PDF document text
    • https://cdn.sqhk.co/nunepokuwe/jagscib/13794258837.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/igdTgfc/38682956612.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/ielts_listening_test.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/three_quarter_view_face_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/cdjaMso/89758418970.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/bewed.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/safubiratuv.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/9f25ce977bbb.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/zirenadusojurixomixobunog.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/i5gfMLS/fezugekaxoreguvi.pdfIn PDF document text
    • https://noxaxubobef.weebly.com/uploads/1/3/1/3/131380993/kademevesexisijiwen.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/vampire_the_masquerade_anarchs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_19552cb4d94742838a39dd829d5f8e49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guxosa/la_culpa_es_de_la_vaca_para_mujeres_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/what_to_watch_after_50_shades_of_grey.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_c51efc2789a54e4d86929b7be6321324.pdf?index=trueIn PDF document text
    • http://wenibeliso.atwebpages.com/sueo_de_una_noche_de_verano_william_shakespeare_pelicula_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/dell_v313w_scanner_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/zijidufatesapivape.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/wubulofutidesajuro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001974b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1974B 4976 bytes
SHA-256: 2bf41e5434d6838b55a7861f28786be3d707ec7b1d9972080d4288e884d85153
font_01_sfnt_off0001a810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A810 13568 bytes
SHA-256: f250d2f37b468b3bc3edb4da916e2491198fc9abcce9868c8f2db88db379f739
font_02_sfnt_off0001d33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D33F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176