Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d680a905a0b1a8…

MALICIOUS

PDF

93.0 KB Created: 2021-03-07 08:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ce1bc36ef0ebabdf92d3711c05587c7f SHA-1: dbbec56859af7e6c9d27078bdd29e166765dcab3 SHA-256: 56d680a905a0b1a8351ff590c200fcbfbc60afc751f6bfc82a1bf85fa49dcddc
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious sites. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic confirming the link farm behavior. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or scam lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=50+shades+of+gray+music+soundtrack PDF link annotation
    • https://cdn.sqhk.co/dedizozife/zifhcVv/tamil_romantic_ringtone_download_2018.pdfIn PDF document text
    • http://nokigafapo.22web.org/how_to_write_a_reflection_about_an_article.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/cbd4a21b5d.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/iNKxrEl/1388956487.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/mjcjjkY/stick_fight_online_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/WY6Rhi0/89867314842.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/6a3JjgW/alan_walker_best_song_2019_mp3_download.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/wedding_invitation_templates_photoshop_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/d3ghYhf/26746227868.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/0b6be026abed.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/bLgeqrm/sopavejamofalefo.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/gcjGGic/topoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_e1aabf6a7caf4f49bda8cb2b71a68e90.pdf?index=trueIn PDF document text
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_1856052ab4504a8aac786d0be2f536c5.pdf?index=trueIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_df1236ca719f4ba4a133bc02d79e9124.pdf?index=trueIn PDF document text
    • http://movetikopuvus.epizy.com/90766328062.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/dulifuteposepukalajifulo.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_e8ec897ecdc24549b01822c22078c820.pdf?index=trueIn PDF document text
    • http://rozesefotuduwef.epizy.com/proyecto_reforma_codigo_civil_y_comercial.pdfIn PDF document text
    • http://xaxibalese.epizy.com/where_can_i_get_my_bose_wave_repair.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_e722b5098afe47f49e73e9c9c6796099.pdf?index=trueIn 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_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 5228 bytes
SHA-256: 047dc6391a7d76680d9ddb3b93002c3e5b626b578055527999ce16f4b8982cfc
font_01_sfnt_off00012ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 5740 bytes
SHA-256: 5cb7663293865b4614a8116149b7bed5c6893f7cf7ce4f99ebe11140df80a815
font_02_sfnt_off00014210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14210 10604 bytes
SHA-256: b00a17fbe3eb830d001a387c53ff9b350641742b068295471c3d0faac148c100