Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3ca62f4c64586e…

MALICIOUS

PDF

80.0 KB Created: 2021-04-14 23:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12c3479273f4e33089a884077e2e5eac SHA-1: aac1789323af1e22742a229dd9156ff21cd13c80 SHA-256: 1f3ca62f4c64586e6c558b37879e05eb199137c5f4edd82cafea393e1c97c5b7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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.
  • 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://maypoin.ru/strik?utm_term=how+to+delete+ntuser.dat+file PDF link annotation
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/sukurazanewe.pdfIn PDF document text
    • https://borupulugugel.weebly.com/uploads/1/3/4/6/134620486/banokasaz.pdfIn PDF document text
    • http://sevaxewux.22web.org/sky_sport_italia_tv_guide.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/tekunobunin.pdfIn PDF document text
    • http://pawunopu.iblogger.org/gisabe.pdfIn PDF document text
    • https://daxuvinu.weebly.com/uploads/1/3/2/6/132695190/vadafexizisu-tapirejijol-dodijat-golumojisifasab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e39ec2-a58d-488b-9c79-b8f1880da46d/shakespeare_sonnet_116_literary_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/122cc638-cf9d-4586-887d-9c9ed3a029cc/95205475814.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kibogetoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/automation_anywhere_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb8c7b6-7cd0-4685-b1e6-31e28525eba0/zoratasawap.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/duzutovugokowawal.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/dlink_dap_1522_login.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/xifaponinazamid.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/twilight_saga_new_moon_full_movie_download_in_hindi_hd_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef09fc76-cc3f-4571-bdd1-7eb68faa1f94/public_relations_graduate_programs_southern_california.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/o_saki_saki_song_mp4_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee477f1d-abab-40e2-ac09-2db7f637b6f8/kyocera_fs-3140mfp_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/reformat_python_code_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/72544297973.pdfIn PDF document text
    • http://podadoperis.rf.gd/56706460094.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/beamng_drive_full_game_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/chevy_cruze_lt_2015_manual.pdfIn PDF document text
    • http://gidalavowew.epizy.com/animal_adaptations_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/tidofelonojazufase.pdfIn PDF document text
    • http://sijelufuzarolup.epizy.com/guidepoint_paid_consulting.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/gizuxup.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_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 4988 bytes
SHA-256: c8ae1812c7f65d67890c1f31c87ae4943bdb502a619373258de70992a23ce351
font_01_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 11412 bytes
SHA-256: a627d3be6b373f80366e4c1929830bf65e124f8231961b6cd1ea13bdd167211f

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