Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af1d57eaad48fe…

MALICIOUS

PDF

74.5 KB Created: 2021-03-11 19:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc8c9d51efee8d106c2ebbf40daf2d3d SHA-1: 19c61706bf2810a1b676227e236e236e57e2cc4c SHA-256: 67af1d57eaad48feea2a2d1ab8df3f756e3557014138916027310bad22268736
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://xajibur.ru/123?utm_term=bam+bam+bole+dance+video PDF link annotation
    • http://classkaod.ru/lelojiwizivolomobenibunomb5oro.pdfIn PDF document text
    • http://rubisteq.online/zasonilavafupadid595ha.pdfIn PDF document text
    • http://milesnires.xyz/what_is_series_in_bosch_washing_machine7pva6.pdfIn PDF document text
    • http://ezfix.asia/nadaxinat004n.pdfIn PDF document text
    • http://presentinsta.online/the_raven_edgar_allan_poe_criticism9b8m7.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/65374324150bzdhj.pdfIn PDF document text
    • https://kapadarobuziwel.weebly.com/uploads/1/3/2/6/132696145/2429904.pdfIn PDF document text
    • http://draiwenstore.online/oster_french_door_convection_toaster_oven_reviews98whm.pdfIn PDF document text
    • http://bbflowers.net/jowimuxalekevekobekew8f0yg.pdfIn PDF document text
    • http://shopsupergood.site/how_to_turn_off_alarm_on_ottlite_desk_lampqa56n.pdfIn PDF document text
    • http://fc-aromat.ru/idsa_c_diff_guidelines2qpks.pdfIn PDF document text
    • http://elinekici.online/93970632196x3v8u.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/mazebelo.pdfIn PDF document text
    • http://copyright-securityx.com/niferegexifuja85ps7.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/gapatigixi.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/mufixojogufokadali.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/fobimuwepiwaxowiso.pdfIn PDF document text
    • http://vengriya.space/kuching_good_food_guidel3ssm.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/specialized_speedzone_1_cycling_computer_manual.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
    • http://gajopule.myartsonline.com/ashcroft_bimetal_thermometer.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/can_you_cook_fish_fingers_on_a_george_foreman_grill.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/administrao_financeira_internacional_eiteman.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/zulezi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 4768 bytes
SHA-256: 270cdb25dcb4a099dba1c724b4b5458812857ae7b9a3fc5c1e986b5dae51d71f
font_01_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 10768 bytes
SHA-256: bf6990e31e9c739bef2e1e02b38a2d71ed41e66e53e635615856fd583a13d5cf
font_02_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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