Malicious PDF — malware analysis report

Static analysis result for SHA-256 af543f8f04476f99…

MALICIOUS

PDF

90.4 KB Created: 2021-04-06 01:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 983078cf599b3bc295f4aef7c084ddc7 SHA-1: b1eee26647332cb9a8dfaff87a06d06afec7e186 SHA-256: af543f8f04476f996848492aacdc71ebdd41a249c4ffaead0b6abcba826ad6d1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://lozipotod.ru/award?keyword=pdf+file+reader+download+for+android+mobile PDF link annotation
    • https://cdn.sqhk.co/ninulekuto/hfjaiaq/batman_the_enemy_within_season_3.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://zeleveruki.weebly.com/uploads/1/3/4/8/134898901/gosuz.pdfIn PDF document text
    • https://sixanatol.weebly.com/uploads/1/3/4/6/134631849/6e4c0cf06190.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/IibgdO3/98234163759.pdfIn PDF document text
    • http://demazopozegefo.22web.org/94641316558.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/ae2857fabf855.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/zabagujifurixodimuro.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/kejolelisudamud-lobozaxegetu-risax.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/mugudefatasubunav.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ggvVjc0/zovutukarepobuxofowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vurosija.epizy.com/95954424753.pdfIn PDF document text
    • http://zizakipu.epizy.com/acrobat_reader_8._1_professional_free.pdfIn PDF document text
    • http://xedunago.rf.gd/aprendizaje_definicion_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ce8c9e-cc69-4a87-b4b7-433ffd1f4e55/notilivadipifoxuvaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e364bd85-8789-456b-ba67-ffac49e58657/fallout_4_mods_xbox_one_2020.pdfIn PDF document text
    • http://gejajute.epizy.com/14439235863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048e25d9-61fd-4559-8a58-e04503dff499/70343162687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a9b3fd-d825-46b6-8ed4-b4b4f3e46f05/hp_photosmart_c4580_setup_wireless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55765d95-9a18-4e57-b7e7-a92b89898b38/how_to_make_fermented_fruit_juice.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/brother_dsmobile_620_error_code_2019.pdfIn PDF document text
    • http://mamuzov.rf.gd/dushman_1971_movie_songs_free.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_off00012371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12371 5108 bytes
SHA-256: 4d0b007625946802a3efd940f121097dac5e6c868662c1ca3ded881fe976e133
font_01_sfnt_off000134ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CA 11408 bytes
SHA-256: bc0035936d85fdaebeb130baecba2a92dae497289240a50f9891a357d608cbb8

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