Malicious PDF — malware analysis report

Static analysis result for SHA-256 05464c8bc75f8998…

MALICIOUS

PDF

80.5 KB Created: 2021-03-13 19:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f21f6dba75e30cfc9d16c272378bb81d SHA-1: bf0297e8ac4f6b1366cc2d289013f78938dbcf58 SHA-256: 05464c8bc75f8998b94255c8e3eac0fc3a9e9a8b1c32cdda77c89db8995d9de2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on suspicious domains and are part of a link farm, suggesting a phishing or SEO poisoning attack. The primary URL, 'https://xezojetit.ru/wix?keyword=student+exploration+dichotomous+keys+answer+key+activity+b', is presented as a search result to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=student+exploration+dichotomous+keys+answer+key+activity+b PDF link annotation
    • https://cdn.sqhk.co/bovutolomevo/wpicNje/debixewozekake.pdfIn PDF document text
    • https://gigemapafinul.weebly.com/uploads/1/3/1/3/131398374/def5d19a9f00.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/fgfoaSH/summoning_simulator_genshin.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/hfvvf1h/20364927093.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/ADYhbje/nail_it_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/shhjazF/61608987539.pdfIn PDF document text
    • http://vulefuxudonad.22web.org/terapia_cognitivo_conductual_en_nios.pdfIn PDF document text
    • http://tewazezila.66ghz.com/song_change_chahe_made_halat_wich.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/dace4d096506.pdfIn PDF document text
    • http://vopibuxipem.22web.org/13927966201.pdfIn PDF document text
    • http://dusosax.66ghz.com/how_to_get_entry_level_supply_chain_job.pdfIn PDF document text
    • http://latujor.22web.org/wepekinipitaz.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/nosozizigukip.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://s3.amazonaws.com/silubebebefuju/championship_manager_2008_full_game.pdfIn PDF document text
    • http://zutadefado.epizy.com/why_is_my_2007_chevy_equinox_overheating.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/xijifejuz.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/89175866169.pdfIn PDF document text
    • http://damugiwixosaxo.epizy.com/new_oxford_thesaurus_of_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/arterial_line_waveform_aortic_stenosis.pdfIn PDF document text
    • http://vepilezora.epizy.com/50021165074.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/android_emulator_linux_mint_19.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/vetebetirenemulomizuzodi.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/tutugirovowowedeganatulif.pdfIn PDF document text
    • http://pikamumoboxajis.epizy.com/commercial_vessel_regulations.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/86211742149.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_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 5824 bytes
SHA-256: 77633bd4c0afdc6fe210aa83c8fc0eb53ddd1ceb13020d6dd79a141e7884311f
font_01_sfnt_off0001019a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 10972 bytes
SHA-256: 5b9df1e27c0eacf4579540ca76054616c74905f413e51948a17c94dfe349b166
font_02_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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