Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ba4aed07ba57b7…

MALICIOUS

PDF

80.5 KB Created: 2021-04-06 00:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3445d608086c64a406cb39801f97ce4b SHA-1: 57ec35151e09401ea64d46a8e4520842040d7dba SHA-256: 56ba4aed07ba57b703eda95c57f06600432935dc93af430efb8cd2e502665896
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=healthiest+thing+to+eat+at+burger+king+for+breakfast PDF link annotation
    • http://profyhouse.ru/veloda86edp.pdfIn PDF document text
    • http://erogan-columbia.site/average_speed_problems_with_solutions8xn8y.pdfIn PDF document text
    • http://newser.site/zombie_roadkill_3d_mod_apk_android_13d0x9.pdfIn PDF document text
    • http://zanartcc.net/5776605811708yqy.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/how_to_sync_usb_receiver_and_wireless_mouse_logitechxz479.pdfIn PDF document text
    • http://socialwave.me/how_do_i_reset_my_motorola_modem_passworddmnpm.pdfIn PDF document text
    • http://copyright-rules-help.com/nisakepobisabidxfl.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.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/migivewuwe/sample_of_autobiography_about_myself.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/71910611735.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/95256832213.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/49092516391.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_00d1b99c5fd24fff914d2a700b7a77d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/business_simulation_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/2966796592.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/microsoft_word_equipment_inventory_template.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/why_is_my_mic_not_working_on_pc_fortnite.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/guided_sleep_meditation_for_wealth_and_abundance.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/48467586485.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/analysis_of_the_play_a_dolls_house_by_henrik_ibsen.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_ae36ac73800d4af88a78c18241071b50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/is_the_mossberg_930_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/34716957105.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/jkbose_date_sheet_12th_regular_2018.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_off0000fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 5192 bytes
SHA-256: 3f13a47fd44224008ea4976b518e42dbeb06fea486b9bf43b7c36741eca916b3
font_01_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 11196 bytes
SHA-256: 2bc418a313100eac3eaddb7f4619bee9baddf040621210b04a88d8035e3a209f

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