Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb573f6ca925b610…

MALICIOUS

PDF

73.3 KB Created: 2021-03-23 13:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10a3ee2a52f1070c6b8a74af0e72c18f SHA-1: b09872f20f1c2a0820e4345eb418155c41085353 SHA-256: fb573f6ca925b610ab3213ddd36f7a3ad71ba02699a5cce1df7615cb717e2f05
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=nfpa+921+pdf+download+2011 PDF link annotation
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/8ce3653666dcd0f.pdfIn PDF document text
    • https://neloramobipetez.weebly.com/uploads/1/3/1/4/131407165/bikolibezowiwed.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/teamspeak_3_android_apk_crackedjrkl6.pdfIn PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/7655668.pdfIn PDF document text
    • https://linulozaf.weebly.com/uploads/1/3/1/4/131437298/ec3c7c3b2ff5c.pdfIn PDF document text
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/f882ce61.pdfIn PDF document text
    • https://gumikixinugud.weebly.com/uploads/1/3/4/8/134864359/ac92f471d.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/5QCJhc4/17454606442.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/hiunjiU/simply_piano_mod_apk_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/hajeicQ/77715859684.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/Rxjaia7/mario_kart_wii_star_slope.pdfIn PDF document text
    • http://istlan.space/the_last_lecture_by_randy_pausch_reviewg4qnf.pdfIn PDF document text
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/7636125.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/sony_vegas_pro_13_32_bit_serial_number_1stiyv7e.pdfIn PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/widixefin.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/da6e8d75-079a-48eb-beb9-30fb0801e4cd/wordpress_responsive_themes_free_download_professional_with_slider.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/private_call_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325ade07-b508-4b85-a17e-f70cc150ddd0/ninja_pulse_blender_how_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/how_to_setup_behringer_xenyx_1202.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/minecraft_1._5_2_adventure_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/favawasenogod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 3212 bytes
SHA-256: 748e1223d06d8ac717cd07391261dab2073868aa99be05a5f720895b2c6390de
font_01_sfnt_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 5304 bytes
SHA-256: 07f7ad0e1c32d473b49b8a51f1e2a75f1556cb4c730d615ecb00f0573c487cb8
font_02_sfnt_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 10672 bytes
SHA-256: 7f1584e4e31a3d7b2fdd76019411c1b51b42d82a9af1f3aa7b9dc327069b29af

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