Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a37806e786a8ac…

MALICIOUS

PDF

99.4 KB Created: 2021-03-04 21:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 67045d4f7c5bde13719028f8296f5aee SHA-1: 91b7b0400aa657235464962aaa0f2b7096e00209 SHA-256: 50a37806e786a8ac652d6858bc89276e60e9c441776d396e58329c874dd02d96
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious domain ('fokemale.ru') that is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=filmywap+bollywood+movies+2018 PDF link annotation
    • http://namibav.iblogger.org/86243338322.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/vuliwisuwig/dante_canto_19_inferno_riassunto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c87e8ac-e7a2-4736-8e1d-3bda59a1a345/visual_studio_2010_express_edition_free_download_offline_installation.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_e7e40725e4a847db8ef903a81ff5f576.pdf?index=trueIn PDF document text
    • http://batogegimuwew.rf.gd/crickets_chirping_sound_effect.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_d4b2c9019ffc43cd961d61ecd69e9931.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_b3487feb4d8c4fba8066d6eb390c56e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/nuklearna_fizika.pdfIn PDF document text
    • http://nosorozu.epizy.com/customs_broker_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678986f4-c984-4238-9364-22983f602fc6/planet_bike_proteg_9.0_computer.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_90953f32ed8c496197f786038912b231.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3818be39-c376-4459-8c3d-63bff6ce19ae/tapudedunujikefipenat.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/soul_movie_player_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d9a5e9-3a5e-473e-9644-8893d0f1ef96/xalozomubisibipubifilex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1c5fb8-a635-4f0d-8a21-372a47f9596f/is_the_jeep_4.7_a_good_engine.pdfIn PDF document text
    • http://gigavolaxo.epizy.com/what_is_the_setting_of_the_rocking_horse_winner.pdfIn PDF document text
    • http://bubewap.rf.gd/best_portable_battery_charger_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca15a2bc-e56d-4c5d-9cc2-18f9517bd5bc/how_much_weight_can_a_pole_vault_hold.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/90697160713.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_7d29887f7ef74e6fb149fc88eeefc24c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/57759490094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5867f72a-1701-4150-9dd1-54e299ff73ab/what_are_some_examples_of_solid_waste.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/jisopufibovupu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 5880 bytes
SHA-256: 466636eea7c9c5d978b8f8c617bbf7b1eb1b7985c086cb9063921b3bcefcb865
font_01_sfnt_off00012ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED8 13992 bytes
SHA-256: 9e99e570e83a1a7f376121bd5d9afbb1917d1da3b55bd3a3990d06446c540611
font_02_sfnt_off000158eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EB 10460 bytes
SHA-256: 70f01e6d5d4f8ea2f14f24175eb1a3ee3e1693b841d7d832a8ace468a155f4b0

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