Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bab682dfb826d8…

MALICIOUS

PDF

71.7 KB Created: 2021-06-05 19:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 023142280b94e1fef478270f552325cc SHA-1: 5725549a8ff7f2c556edbccb9bfb9618d360bc4e SHA-256: c0bab682dfb826d87b91342d9ccbf1189b658e31bd816044104694f1d98bb21a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and contains metadata related to PDF generation tools, but no clear instructions or lures are discernible from the readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://pixomot.ru/pbw?utm_term=aleko+gate+opener+programming PDF link annotation
    • https://jasuxazej.weebly.com/uploads/1/3/4/8/134875243/basitutidur-tixatiset-feputotalulupit-nakod.pdfIn PDF document text
    • https://mutovowi.weebly.com/uploads/1/3/4/8/134862221/e0b5054.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/felanoleb_lefoniwure.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/fasezukizoriw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ravowibosu.pbworks.com/f/51739301181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf1ce91-6c80-4b71-8a15-f73f0372a68b/bimet.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/eternal_sunshine_of_the_spotless_mind_story_explained.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/cuaderno_de_trabajo_de_historia_geografia_y_economia_5to_de_secundaria_minedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea86302a-cdf8-4477-84df-d9889aa8b0e5/tupperware_rice_cooker_price_australia.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/f/lakekugorimavux.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144444150/sulenufitiwekawata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682a6e41-dd55-4524-b343-f33855a802ff/65126411199.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/free_event_sign_in_sheet_template_baby_shower_guest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b5accd-a615-470e-8197-2f0434cb89b4/xodisidariviji.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/707861912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3dada0-d763-42af-82b2-ff148ffe3b14/how_to_draw_clouds_with_soft_pastels.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/w/file/fetch/144424938/rajasthan_patrika_news_paper_today_in_hindi_barmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84f2364-ecd5-4ee6-a866-63181376ed5b/40692601507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c2fd4d-1be1-43af-ba77-8721026254a2/karisujakir.pdfIn PDF document text
    • http://sowenux.pbworks.com/f/summertime_saga_apk_download_for_android_unlimited_money.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144428004/brt_iletme_sermayesi_nasl_hesaplanr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7eb9f9b-f508-4f61-a4b4-0994b10a673b/holt_biology_photosynthesis_and_cellular_respiration_quiz_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462e6842-0511-43d3-8d0b-0b2978ed79b8/fepabedugadajeno.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_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 5012 bytes
SHA-256: 5e1c29c8d5dfeed1a1a9a1ed10b92d635da9ca4723f22b7d680b75f92ab1ec39
font_01_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 10796 bytes
SHA-256: d3a0f91e71133c9669fa04081991454e2be7505f992e6d220b7e1648dbdde33d