Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6dde161b811d20…

MALICIOUS

PDF

82.4 KB Created: 2021-03-22 17:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 64d953736b09326180ccefa9052e2f71 SHA-1: dfacb89644132c238d004ac51340f0900f346a6f SHA-256: dd6dde161b811d204f085f63b58863c9d04c55dff0527cfb20b18b8f18002f38
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://gimoguvi.ru/award?keyword=ascariasis+en+ni%25C3%25B1os+pdf PDF link annotation
    • http://gazorowegesejix.22web.org/native_american_zodiac_deer.pdfIn PDF document text
    • http://resimpub.com/basic_dd_vs_add6wuga.pdfIn PDF document text
    • http://alex-chekalev.com/kudukofuhj2qo.pdfIn PDF document text
    • http://rarojujelalonu.iblogger.org/50291917505.pdfIn PDF document text
    • http://shoplus.info/acer_xg270hu_review_redditt3v0l.pdfIn PDF document text
    • http://aycotoro5.xyz/puzowovenesks85.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/bajugukigopiru.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://xegilejefaga.epizy.com/arduino_uno_programming_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/firefox_versi_50._1._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806ada4b-ffa2-40a1-8e6c-f27aa27645bb/the_natural_order_of_things_meaning.pdfIn PDF document text
    • http://lobobojisuwifip.epizy.com/30046365757.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/2137103664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27cd157-9732-468e-af65-abd898f5e040/befijozorivomud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ce320d-7483-44ef-8f86-79a2a7a5aaed/2000_jeep_grand_cherokee_under_hood_fuse_box_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/best_chromium_based_browser_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbec013-0c7c-4df5-87e0-587bc0613077/what_to_write_in_a_card_to_your_goddaughter.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/combine_excel_sheets_into_one.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/kadorenelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ac7f4b-06d9-4e25-8fb1-98cdc594386e/kivarolarelexumakabijebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702a4b03-bdbf-43da-b681-6dc58650bee9/zebaxizebobu.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/long_battery_life_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b19470-e6a8-48dd-85e9-aee25585a38f/lord_of_the_rings_timeline_books.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_off0000f615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF615 5024 bytes
SHA-256: 32c691e1c1db4e1b5312998b45f5488d42c11b122ebb1e242d0fc75a533cd988
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 11592 bytes
SHA-256: 8c893b16b5447c0066d775adb7a70d536a11b87671faeceef32f2fa912933da0
font_02_sfnt_off00012c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C31 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34