Malicious PDF — malware analysis report

Static analysis result for SHA-256 6374079ad3cfc846…

MALICIOUS

PDF

80.4 KB Created: 2021-04-05 04:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 07017b2a9fea2765af85283853f9ec85 SHA-1: f900d8a806e1418252bc72465140f997dcca39fe SHA-256: 6374079ad3cfc846bfe9c1b0255afcac3478072beffeece5ba368a3f31f07824
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'gimoguvi.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, contains text related to 'Breeders Cup' and 'wkhtmltopdf', suggesting a lure to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/123?utm_term=breeders+cup+2019+past+performances+free PDF link annotation
    • https://cdn.sqhk.co/zesuxetirano/gf2gjSH/polytone_mini_brute_ii_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/qghjfia/spaceship_simulator_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_5fe615ea16092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fde56e77ef16.pdfIn PDF document text
    • http://tamakar.tech/the_legend_of_futianuxiqz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_6006f4af43cc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420748/normal_5feb6b6c887c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_60355b44aae03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5fe172a3a4ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_60411485de84a.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/5q0jhXJ/escape_game_lab_geneve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_603050b335bce.pdfIn PDF document text
    • http://labincom-med.ru/nomipijazidadawazo997rn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5ffb563c7e20b.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/hagiggq/get_likes_comments_and_followers_on_instagram.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/somisilegex/1996_nissan_sentra_repair_manual.pdfIn PDF document text
    • http://woxebolinos.rf.gd/city_of_ashes_movie_where_to_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/the_standard_hotel_restaurant_menu.pdfIn PDF document text
    • http://tadekisez.epizy.com/algebra_2_textbook_holt_mcdougal.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/macaron_template_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/who_is_the_female_ufc_champion.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_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 5800 bytes
SHA-256: 6529a9750f306259fff8f27dfa6c02033079ae8f9961609d8977ff363e0755eb
font_01_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 11716 bytes
SHA-256: 02676e4343c6366d6f70e57566b615a129b62fd4e9a70e06470f450b9732ff2c

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