Malicious PDF — malware analysis report

Static analysis result for SHA-256 46738b5721e159de…

MALICIOUS

PDF

79.4 KB Created: 2021-03-22 11:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 529a3aa69f66dc83b621bd7d658610d0 SHA-1: 1ba2aadcb66f459e7c3a70515ec5c7c63516bbf1 SHA-256: 46738b5721e159dea3bcbd6cbc7634a868465ee48d9db7f787acdf2a1654f693
214 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF redirector and a link farm. It contains a large number of embedded URLs, with at least one pointing to known malicious infrastructure. The presence of numerous links suggests an attempt to direct users to external, potentially malicious, sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/award?keyword=cctv+cameras+installation+pdf In PDF document text
    • https://cdn.sqhk.co/mivadunoxo/iGMc42c/3d_pinball_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/mudebijutene/7FhjgcJ/87608777156.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/jg6hg7u/lion_run_cycle_gif.pdfIn PDF document text
    • http://kokilubowo.22web.org/galileo_brecht.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/vyijvQK/7038911727.pdfIn PDF document text
    • https://raragunaxunu.weebly.com/uploads/1/3/4/8/134886293/kejupolegiwobipabe.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/d09j2jd/gasavox.pdfIn PDF document text
    • https://cdn.sqhk.co/mawodoso/e2l6gic/portal_del_usuario_sib.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/ganixe.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/bzOifVE/word_connect_game_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vulasobifow/a6FFghV/borland_international_turbo_c_version_3._0.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/fewokozotabegaruli.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/f123c661-0e4d-495f-9afd-24468868e64c/what_is_the_largest_source_of_natural_carbon_emissions.pdfIn PDF document text
    • http://tanegonezato.epizy.com/xemumomiwoxuluveriwizudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3a6a28-650d-4f0c-8439-5b0ad0d3157e/how_to_apply_stickers_straight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6610de-f78e-42af-9356-4599fc504027/the_real_christmas_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdbd301-3aae-4f08-b07b-978605e3bb91/55567404878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280973b4-b90a-4be5-8655-08c0dab61164/audiolibro_cien_aos_de_soledad_capitulo_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3281964-f96a-4c0d-b4f1-d22d7cc35861/pallet_jack_replacement_parts_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc25919-641b-4eb2-9ea9-997020517d7c/18427925351.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_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 5264 bytes
SHA-256: d089a1e6aad401fe6c9f5d1ecb40aa80bc535cbf478d11fb0b25c25a6ee6d79a
font_01_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10740 bytes
SHA-256: f1a009280c1ad39dbbee3ed122abdc4629f5d2ca9258baa404ecd34d834ba9cd