Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14779835f506a81…

MALICIOUS

PDF

72.1 KB Created: 2021-03-31 12:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 251df1b8b584753c4e63671082d4ea4b SHA-1: 7a28df94343c1294373f451619d4f242868bd497 SHA-256: c14779835f506a81cdf2a2b8d3d83a7a94b7c1845fb4ec34a29c650145e08df2
124 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs further supports this, indicating the document's primary function is to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6871

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=teoria+presente+simple+ingles+pdf PDF link annotation
    • http://propovar.ru/javascript_tutorial_udemy_freeze4s4.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/ih4gjmY/kakebowajopimep.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jiRYXhE/53876448970.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/barreras_no_arancelarias.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/92725508829.pdfIn PDF document text
    • https://cdn.sqhk.co/zogugumo/gghjkje/creeping_terror_3ds_guide.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/nenidewojabufadizalun.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/ghg7gjI/kojajadepomazowixuzeda.pdfIn PDF document text
    • http://buybritishcat.com/4698216091v4yhp.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/midazifilomewivome.pdfIn PDF document text
    • http://dfds.in/mujer_que_sabe_latn_completowi1vg.pdfIn PDF document text
    • http://trujillostacoshop.com/dalasafirol7qgz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/cQ2k5fb/77192092742.pdfIn PDF document text
    • http://plafond.xyz/15559651860agz9h.pdfIn PDF document text
    • http://stav-games.ru/aqua_logic_flooring9u8k6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/how_to_buddhist_meditate.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/baarishein_anuv_jain_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a04d5ec-21a1-46c1-af2f-b6e1fa8b4588/goodes_world_atlas_22nd_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/21339122449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/292f2457-c596-4cd2-92ce-89206b999afb/fonoroguzirisupu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/unity_3d_endless_runner_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852f40c2-4624-4e43-9f9b-0c5999eaa42f/dibs_in_search_of_self_virginia_axline.pdfIn PDF document text
    • http://tirigofov.atwebpages.com/28595136812.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 5096 bytes
SHA-256: c106a0c6a332ff07e4bf0d6bc4dd2bf6517ca25671ba73e2b940c5fa7101528b

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