Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ba2772b31d06fb…

MALICIOUS

PDF

79.6 KB Created: 2021-03-14 16:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5746839023ca298b07159e39720df5cd SHA-1: 7a2628b8dc22625541d15be33829be49cba53cf9 SHA-256: 48ba2772b31d06fbd8327fdfc38c0098aa92a3be4728627ce5a770df24fea384
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to job searches, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=graphic+designer+jobs+salary+in+delhi PDF link annotation
    • http://kunujunekedi.mygamesonline.org/77169127991.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/gfMqjfL/rebirth_plot_movie_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/ravunovibuxi/Uhziajc/cross_stitch_patterns_dmc_thread.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/igV35FF/veperovi.pdfIn PDF document text
    • http://antonioita.fun/sewom3jcfm.pdfIn PDF document text
    • http://neo-tp.ru/wahl_hair_clippers_charging_cablexabcn.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/lFG7iib/unicorn_dash_magical_sky_game_download.pdfIn PDF document text
    • http://stav-games.ru/the_essential_life_book_australianeulz.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/75945240303.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/what_is_another_term_for_informal_language.pdfIn PDF document text
    • http://top-odejda.com/barinh0nmj.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/jikofojerer.pdfIn PDF document text
    • http://sexesex.site/what_is_the_price_of_a_swim_spazsacn.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://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_b72c75dec6d44e3eae6867ad60ed0b43.pdf?index=trueIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_df2b33299b4d406eb68c27d34999801a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/tuwex.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_75650764056b42de8d42537901a70ce4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/53636873297.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_9dd513462d5d48cead7f5f981341038c.pdf?index=trueIn PDF document text
    • http://tuzuxutetug.atwebpages.com/wogodiwegivo.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_e8c0db992e424f79aeb2e7803dfb7baf.pdf?index=trueIn 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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5392 bytes
SHA-256: ed55d88249b33a1cb31363efd7ac10c496d94dd261a6759d341a98a89e9d269a
font_01_sfnt_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 10368 bytes
SHA-256: 226b97aff52bd1801e1e53c72b5e670caa18c0ba5d036ccaaa9127870e858687
font_02_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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