Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc11d387debc503…

MALICIOUS

PDF

95.3 KB Created: 2021-03-31 01:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434bb5d8452b67afd600905a14861679 SHA-1: 4bee404d2dfdcc056dfd535d1a8fed2481c416d9 SHA-256: 6dc11d387debc50366cd5116d5befdaa177af1cb1d6e9edc9c6a04f3f1e68d93
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading content, likely malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest the PDF is designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=telugu+bible+pdf+books+free+download
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/b4e274ed316c.pdf
    • http://vasizazesunof.medianewsonline.com/emulsion_polymerisation_and_latex_applications.pdf
    • http://onsideball.info/how_to_calculate_discount_rate_for_cash_flowp1r5c.pdf
    • http://kunujunekedi.mygamesonline.org/can_you_be_a_nutritionist_without_a_degree.pdf
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/wirofanise-zomiwuforurufa-zesewof.pdf
    • http://sodalabs.club/roxanugufiwokix3wntc.pdf
    • http://zuzorovix.scienceontheweb.net/raleridex.pdf
    • http://sks-expertiza.ru/d__d_place_restaurantewuhk.pdf
    • http://rowowesofazov.medianewsonline.com/30_day_muscle_building_workout_plan_without_equipment.pdf
    • http://smm-target.ru/arduino_language_codexmqxk.pdf
    • http://zhk-samolet-krasnodar.info/6801194344s1ip1.pdf
    • http://pakunobun.getenjoyment.net/mechanical_aptitude_test_practice.pdf
    • http://presentinsta.online/jukizivescswfc.pdf
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/4689962.pdf
    • http://redita.fun/80953849924ujhkh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/07a0df0b-b0c8-41c1-a8aa-3f1df5031107/mupabup.pdf
    • https://uploads.strikinglycdn.com/files/e82ec9ac-ee12-4a92-a214-aba03c1b43ad/another_word_for_good_sightseeing.pdf
    • https://uploads.strikinglycdn.com/files/c0d36927-6eb2-42ba-a20b-0459166cb0c8/the_wave_book_todd_strasser_sparknotes.pdf
    • https://s3.amazonaws.com/dibedamoka/sividosapufezi.pdf
    • https://s3.amazonaws.com/nitirew/nadoworanatixelujonugova.pdf
    • https://uploads.strikinglycdn.com/files/0daadec5-3637-48c2-b51c-81515aaf9865/how_to_make_a_dachshund_stop_biting.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ea.bin
38b32fc8e1fd28d3b0e3406d9a3cf8cd700e859c20c5a422088c7e6072aa5444		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5452 bytes
font_01_sfnt_off0000f394.bin
2d60bfb9d21632d0f8eb9cd8683d3b0ee1516a4478609144e4250ab258c6899b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 43452 bytes
font_02_sfnt_off0001474d.bin
b9dd0fdb8bac068207f9ebd90a05ed11de30d974521a1fbefed97296958cdc9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1474D 10952 bytes

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