Malicious PDF — malware analysis report

Static analysis result for SHA-256 723953eeb6fa5e95…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 08:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0617a99890abe836a4c5366a4254be5e SHA-1: 6a7fd2952f8bc1796a8d2ad525f34b85b6bfe83e SHA-256: 723953eeb6fa5e95e0d3c0609ab2183aa3e90e756c5221de36f9ea876d5e6b13
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting it is part of a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the document's structure are consistent with a lure to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=tv+tuner+for+laptop+free+download PDF link annotation
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/liwixibuvufoke-jamega-nobamata.pdfIn PDF document text
    • https://xikipavukageza.weebly.com/uploads/1/3/0/7/130776529/75d9c024f237d10.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/charles_baudelaire_the_flowers_of_evil.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/sf2EMic/list_of_2017_pop_music_songs.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/4199786.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/xgfhcgi/fake_caller_application.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/hIaEjh9/nenidujonumurakixizomov.pdfIn PDF document text
    • http://vuvabadiredowa.getenjoyment.net/convert_to_word_desktop_software_setup_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/Jigjb7J/langrisser_1_and_2_ps4_review.pdfIn PDF document text
    • https://falosaxosudo.weebly.com/uploads/1/3/4/0/134017699/tubifuv.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/aOhjVhf/adobe_flash_player_version_11._3.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/logowelivelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_46bb4572fd4e4ddaa19a51e430341fe4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc547a2-7aad-44a2-a67e-cc1eb4f6916a/hexa_block_puzzle.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/ios_13_beta_2_developer_profile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066053dc-e799-4fdb-84e9-8dc178beecc9/finakanune.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/kabza_babbu_maan_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/rusavibasi.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_48af57a1796746c098aafba21a0a842e.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_3006a384d1ae4bb5b7a695a07031016f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c5623c-6762-4ae1-90af-92ddbd168b12/libro_la_meta_de_eliyahu_m._goldratt.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/likixune.pdfIn PDF document text
    • http://minivenema.atwebpages.com/58819857199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b3bcce-d1d2-433d-b82a-b6fe8fbe9871/36275305904.pdfIn PDF document text
    • http://fumibilulad.atwebpages.com/rural_marketing_strategies_of_amul.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_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 4960 bytes
SHA-256: 535fabcc65021a0fd6d3c4f402cdb8012869b71495732b66e5dc04d967018df4
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 10800 bytes
SHA-256: a67f549b0df7f61da5aabfdb972e3cfe330af46d469e14537929945315553d5e

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