Malicious PDF — malware analysis report

Static analysis result for SHA-256 5371edade97b0604…

MALICIOUS

PDF

90.7 KB Created: 2021-03-20 14:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c7176b0b69345e2c5b899a5a30c16b57 SHA-1: b746058a9d1e488343ae4654833346dcfc1e10a5 SHA-256: 5371edade97b0604d15e36f57ffe356ff5b427e4ab01e3c93a777f4736923f36
136 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it is an SEO redirector link used for phishing, disguised as a free download. The embedded URL, https://leonvi.ru/strik?utm_term=what+is+data+quality+management+in+healthcare, is the primary indicator of this malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/strik?utm_term=what+is+data+quality+management+in+healthcare PDF link annotation
    • http://girlsbeach.space/trader_vic_s_bartender_s_guide_1947srhyr.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/bhgEftC/monster_shooter_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/gTa0Zjg/ewallet_cash_out.pdfIn PDF document text
    • https://cdn.sqhk.co/rapalaxob/hfSibid/cinemark_ecuador_guayaquil_mall_del_sur.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/d0jyAE9/miriam_the_escape_apk_mod.pdfIn PDF document text
    • http://natural-shop.info/best_android_emulators_for_pcp9dfo.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/ggfjjhc/mofikadowo.pdfIn PDF document text
    • http://kyponnik.online/belemmyb9r.pdfIn PDF document text
    • http://pay-order.info/zikal4v7zy.pdfIn PDF document text
    • http://uscreditinquiry.info/singer_simple_sewing_machine_2263_needle_size3f5s8.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/salosibejodod/18296074765.pdfIn PDF document text
    • http://zikukoji.epizy.com/ascii_form_feed_f_python.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/disbursement_journal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/my_credit_report_singapore.pdfIn PDF document text
    • http://kunijudodo.rf.gd/boboiboy_galaxy_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19050e2e-78cd-473f-9ed2-4ea2cffd8c51/reloading_powder_for_223_rem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6329983-395c-4726-8383-4199efab42b8/pebixolirozelepazomeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/71028190923.pdfIn PDF document text
    • http://didosides.rf.gd/current_challenges_in_operations_management_include_all_of_the_following_except.pdfIn PDF document text
    • http://gagonunanu.epizy.com/zijezojojisufepalajego.pdfIn PDF document text
    • http://zoxuditavuvov.rf.gd/firefox_52._9_esr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efd2340-6fac-48d8-ba99-c0be3da70b67/first_conditionals_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/constitution_of_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de69e852-c5af-4eab-a34d-1f7fdc8656d2/58660957489.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/tumolufotojamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb510088-aa8d-4d3d-951d-e99a3500b077/how_to_fix_black_screen_on_acer_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/22389783205.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_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 5592 bytes
SHA-256: c648988baff1058aaba5ea2a2ff9f75a5321bd12f2570adab3e57ffa48821167
font_01_sfnt_off00013739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13739 10920 bytes
SHA-256: e481b8f994a0f47c1704f52f7dd69b52c2c014108ffd6a1149ac069b31187702