Malicious PDF — malware analysis report

Static analysis result for SHA-256 187e14a2639ebfb7…

MALICIOUS

PDF

84.3 KB Created: 2021-03-24 06:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e01019a845af097b50e37f656ab60b2 SHA-1: b51737b81a8e72e413882e4f280d3ea435346e9f SHA-256: 187e14a2639ebfb70e8f1bf46d28e56e5b3731c120a441fa7764786ce635762d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed for SEO. One of the primary URLs, 'https://xezojetit.ru/wix?keyword=cd+key+total+club+manager+2005', is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=cd+key+total+club+manager+2005
    • https://cdn.sqhk.co/sinupupuzaxa/wyhaD8c/zuru_x_shot_bullets_compatible_with_nerf.pdf
    • https://cdn.sqhk.co/pomijatan/sMiihgI/download_game_super_falling_fred_mod_apk.pdf
    • https://cdn.sqhk.co/refevebux/ggToAyM/armor_color_circles_breaker_box.pdf
    • https://cdn.sqhk.co/toxinize/hUfATgc/wordpress_social_login_shortcode.pdf
    • https://cdn.sqhk.co/jigitovewuk/jaEzvb1/puvikinatu.pdf
    • https://cdn.sqhk.co/vuwonesi/iaphgJG/hide_files_in_canvas.pdf
    • https://cdn.sqhk.co/fukonovum/yggibgd/fruit_smash_cocktail.pdf
    • https://cdn.sqhk.co/rivitovolu/ehfhkdx/vuvin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/63fdb5fd-7e09-4252-ac3b-5734d678a8fe/12811911274.pdf
    • https://s3.amazonaws.com/fodose/57183850416.pdf
    • https://s3.amazonaws.com/vosimalume/76081465455.pdf
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_c7f11e560fb849309e51b847ac951af8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/adddb3ba-de29-48df-b453-0b982d209de4/icom_ah-4_loop_antenna.pdf
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_6d0272be90424569b043d5349befaf3b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/99f414ce-c06d-40a6-bc7e-0235ec2ad89a/xuwejuninamikop.pdf
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_6c7f7bda82254775a5114b12430bfcb6.pdf?index=true
    • https://s3.amazonaws.com/wunojipu/mugesoka.pdf
    • https://uploads.strikinglycdn.com/files/43a87b08-cff5-487c-94b8-59d46ba84304/how_to_find_ratio_with_variables.pdf
    • https://fac7854b-22c3-40b9-bef9-ee94a55a010d.filesusr.com/ugd/fba82c_a5caf3346f3a4d0593c21d1554e32630.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4fadcc43-d8f9-40d0-a4db-f0ee38b2dfc9/what_does_freedom_mean_to_you_college_essay.pdf
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_449a835c9f5345b5904f21216b2ba6b8.pdf?index=true
    • https://s3.amazonaws.com/vabedafozo/the_ambushers_1967.pdf
    • https://s3.amazonaws.com/kobivimelelo/pirates_of_the_caribbean_game_softonic.pdf
    • https://s3.amazonaws.com/zalisujezajaje/gym_jones_300_workout.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e957.bin
ad448be326690ac0b787e2f092501a58df1dfff36f2ad97e9161b2d566196438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 5692 bytes
font_01_sfnt_off0000fca9.bin
e9a6be14ab43655dc38e20e812f4cdc0851f58c12d594f60b3e71e99d8f56514		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 12260 bytes
font_02_sfnt_off000124fd.bin
3d96aa2ccc475bd6a31511db468cadc27adc026c722caba17a5e19d68bd1e9ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124FD 18620 bytes

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