Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7b4fa2e1fadbaf…

MALICIOUS

PDF

76.0 KB Created: 2021-05-08 18:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 527325ee908397d262d1dc6c133cbc92 SHA-1: e6e9d48c95b16e40250cf52057ad74cfe452570f SHA-256: 1b7b4fa2e1fadbaf4321582861174d989e82142fee1832ac5774526ce07d7d41
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 0.9996

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 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://xajibur.ru/strik?utm_term=what+does+starbucks+pay+in+texas PDF link annotation
    • https://cdn.sqhk.co/lixozimiz/Fggjahb/falling_waters_trail_nh.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/hebiaif/zong_free_internet_gift_code_2019.pdfIn PDF document text
    • http://sikuwolawotoja.22web.org/67744701649.pdfIn PDF document text
    • https://cdn.sqhk.co/rumobotituda/o8YeVpA/26129927778.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/heo3bhh/mx_android_tv_box_remote_control_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/RgihfTs/training_program_for_youth_basketball_players.pdfIn PDF document text
    • http://bodegumuxizobi.22web.org/example_abn_number_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_2e5d627bc59b4359aac6e6edf0f043f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/werepanudozawojoliwomu.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_c1dcc17a22c541d4aefc9fe46fd87d2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/the_skin_im_in_quotes.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_7961e78de82a460194d108be967befb5.pdf?index=trueIn PDF document text
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_6df93613607f4f21952aad3d0925d34d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/88290273610.pdfIn PDF document text
    • http://romamosok.rf.gd/sulutigubepesagavutiz.pdfIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_2ab47ff54c69499996cba5e263643d22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunojipu/mimukasegejolumunene.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/64555936327.pdfIn PDF document text
    • http://gawuvuv.epizy.com/vpn_express_apk_premium.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/45473913932.pdfIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_d05264c808f843cfbb9198e8456d322e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setikizo/apple_configurator_2_for_windows.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5516 bytes
SHA-256: 73ad41e68504dd774c18f86a435b2b763a523f9a1b28eedc2f42e19b9cf3f67e
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 10616 bytes
SHA-256: 145f27dbed952038340ddc7b14acca67a4b906a96e1ffe2c314e98626ed8e92f

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