Malicious PDF — malware analysis report

Static analysis result for SHA-256 13abcde7210f4622…

MALICIOUS

PDF

79.4 KB Created: 2021-04-06 01:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5cce5d93d7e46f54bf494b7e1808de70 SHA-1: 471c7b6cae8dfb47ce609ed7c61a591e6e90ee1f SHA-256: 13abcde7210f462247741ed43231ec0cfa81896499812e85d520f4ef279ee9af
126 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with a high heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs point to suspicious domains, indicating the primary attack pattern is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/123?utm_term=anexar+pdf+em+word PDF link annotation
    • http://iblack.space/ferraillage_dalle_pleinekbqg1.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/gSc76jg/zokufuwisasurefo.pdfIn PDF document text
    • http://sallehq.xyz/wujolijagonuwomupuue5ld.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jbghvia/go_long_game_meaning.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/hfNcmjc/yellow_apple_watch_band_40mm.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/jaNifgc/how_to_go_viral_on_tiktok_hashtags.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/5jjBDHw/xupopaluwodufi.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/wotonubirakfpcc.pdfIn PDF document text
    • http://banki-internetowe.com/22480977269u0nhm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/45469422650.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/alaipayuthey_tamil_song_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef92beb-3d07-436e-8e6b-ca67708330ca/motorola_xts_5000_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df888a39-b3b3-4621-9b9f-53f7eb68f597/buenos_das_mi_princesa_hermosa_carta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac013b2-178a-4d56-8b27-fabcce9d8f05/sitcom_structure_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e9f5e3-7fc2-4fbd-860b-ce9c7ac8c7e1/what_is_first_second_and_third_estate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dec98e-93fb-4807-9cc2-93def036799a/how_to_write_a_poem_easy_steps.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/difference_between_isometric_and_orthographic_projection.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/javascript_backtick_format.pdfIn PDF document text
    • http://lififisemevuko.rf.gd/91569628770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d54695-c58c-4e92-b40d-fb05afc4479f/rawumujevipufigesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36a33b3-d0b2-4a67-a4eb-c30eeb2d693b/34124474113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4733a962-7c41-4052-a17d-4879db0cd62f/kirby_vacuum_supply_store_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf26ff-0d75-4f3a-a3a6-af4546fca454/html_basic_tags_in_hindi.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_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 5128 bytes
SHA-256: e76fabb78757473461a6c5db9d54bf0cea5799edc86cc8c63f3e913a71d2a65a
font_01_sfnt_off00010940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 11492 bytes
SHA-256: 69ccb3e702578c11cb72aa6578d1cb5ccbebcd7301f843167a32c7ec20cd5602