Malicious PDF — malware analysis report

Static analysis result for SHA-256 25dd4c2f04975ef4…

MALICIOUS

PDF

85.6 KB Created: 2021-05-09 15:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d732f8b62c780febe57b449c2037739f SHA-1: b8e2e755355fdfc3ecea0993641bf9de3147ec6c SHA-256: 25dd4c2f04975ef484b64cbccfd2df9ea6438fb95547b85539a046c9d0aaae60
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://leonvi.ru/strik?utm_term=mini+cooper+service+center+bangalore PDF link annotation
    • https://cdn.sqhk.co/xilelawemu/jpehgD4/zuwuvimilurazeneninabajoj.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/7ckxqxi/dog_runs_for_sale_in_cork.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/hhS4cgg/critical_kush_grow_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/bsf_online_bharti_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/transformation_sas_en_sarl_capitaux_propres_ngatifs.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/reading_comprehension_strategies_worksheets_for_elementary_students.pdfIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_f504f8d457b24b9395b89150af16280b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61a15f7-95e8-4aa0-9cd2-2000a617f66d/nikon_coolpix_s9700_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7aca28d-fcdb-41a0-adca-3e6d73114d3e/54921568862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b3b453-8004-4d03-b52d-2ea84632f920/how_much_does_a_navy_seal_team_6_make.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/pinixaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08139671-327a-4aad-a760-2da045fb2f95/how_much_does_xfinity_security_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd72909c-fcb2-480f-9191-781297d12a40/jim_stoppanis_encyclopedia_of_muscle__strength_download.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_d75f985457dc41b1ac3a5fbd88de9184.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92f87cc-0ede-414b-873b-1107826689aa/ramev.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/accounting_financial_statements_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d730f122-09ef-47c7-b2dc-6076aeb9c43c/31284650111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e10630c-6ed8-4af8-988c-4066ba9adafb/8121063527.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/aesir_armor_puzzle_answers.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_c87d056e0f89441a9d895769659c34a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22804305-8d63-48ab-8596-949bf552c3e0/exalted_third_edition_download.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_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 5092 bytes
SHA-256: 56ee784ce4e4b327f2fa31ba09a82ae879b4422cf377adc556b0cc038ee891bf
font_01_sfnt_off0001144c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 11452 bytes
SHA-256: ee54d7c605e9ad4af5b8b31e74681f49afbbda26cc9cab2a1225a86fc978907f
font_02_sfnt_off00013ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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