Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b0778dff2aac52…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 19:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 42a0f8eee54e30886c94cee5b9f9e56b SHA-1: 7125d755ec5887843d0c5b249436fc25a467e980 SHA-256: 13b0778dff2aac521cdfa3354e710ba64a97cf80d148c8aca1e04e07338d32b9
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, with one URL specifically matching the document's apparent search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to direct the user to a malicious site.

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 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://jottigo.ru/award?keyword=pronunciacion+abecedario+en+ingles+pdf PDF link annotation
    • http://itrom.fun/husqvarna_viking_emerald_116_sewing_machine_for_salenqzgm.pdfIn PDF document text
    • http://idslim-italia.site/rentabilidad_definicion_segun_autores32og7.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/which_college_is_best_for_mechanical_engineering.pdfIn PDF document text
    • http://cybety.xyz/lubirewulukevirodaqij9l.pdfIn PDF document text
    • http://madamzero.com/wikatilautlh5.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/brother_xr9500prw_price.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/buet_admission_circular_2020_19.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/20201926181.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/43255220668.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/tekisiziko.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/whats_a_calorie_surplus.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/aesthetica_of_a_rogue_hero_light_novel.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/bivogegivukewemuni.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/sadefalasewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxewape.myartsonline.com/nekaxovolozememusimivuwi.pdfIn PDF document text
    • http://bajobakokela.epizy.com/20799298019.pdfIn PDF document text
    • http://wemiwapava.epizy.com/the_book_thief_by_markus_zusak_read_online.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/briggs_and_stratton_small_engine_care_and_repair_manual.pdfIn PDF document text
    • http://venugowus.epizy.com/natikum.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/baby_names_and_meanings.pdfIn PDF document text
    • http://buxozininexe.epizy.com/introduction_to_addictive_behaviors_4th_edition.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/john_deere_js30_carburetor_removal.pdfIn PDF document text
    • http://jilawovo.epizy.com/possessive_pronouns_activities.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/annahar_newspaper.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 5464 bytes
SHA-256: c083f62cd0c348388bbb7a8915ed24028fb4fb9adf55856fae177de101d01448
font_01_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 12932 bytes
SHA-256: 9c004f9f623247403bc57a94e484bb4e84197a1963408d3221795432465e4bcd
font_02_sfnt_off0001282f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282F 16340 bytes
SHA-256: 8680b359cba86e2f6e9a78cf8c0f9e51b009e062d62f51157c34cd29f25a410b

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