Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e53ce16109296b6…

MALICIOUS

PDF

65.0 KB Created: 2021-02-22 17:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6986bb53c6775f0f19a1afeaf1784b6a SHA-1: b9c927b19d500f4c50f87f6b49ff2030995da46a SHA-256: 1e53ce16109296b6809e5255bd07511842d827c3c48c9fcae7ae573ae29aefee
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting it is used to distribute or redirect users to malicious content, such as the 'pokeland legends apk download for android' lure. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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=pokeland+legends+apk+download+for+android PDF link annotation
    • https://cdn.sqhk.co/pafevola/ajduigE/38004920921.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/hchcggN/55621414070.pdfIn PDF document text
    • http://vekvelo.ru/the_stranger_book_review_new_york_timesdz92p.pdfIn PDF document text
    • https://cdn.sqhk.co/kofatuziwu/7YkLhgj/xs_blast_energy_drink.pdfIn PDF document text
    • https://cdn.sqhk.co/rijizedot/iJigif4/63077015351.pdfIn PDF document text
    • http://bristol-yalta.run/convert_json_to_multipart_form-_datap620a.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/YgiYVid/express_pay_my_bill_phone_number.pdfIn PDF document text
    • http://itanah.space/benoviloguni7lm.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/gficjeK/2203188052.pdfIn PDF document text
    • http://8gusevshop.space/mavuligadsesd4.pdfIn PDF document text
    • http://hugertely.xyz/3893161676iquk8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_600a866de8d3e.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/gjhegdt/cuballama_recarga_especial.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/44jfAgj/54269382194.pdfIn PDF document text
    • http://health2health.online/french_subjunctive_irregular_verbs_list2nxq0.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/jgje3gj/color_wheel_picker_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D1 5368 bytes
SHA-256: 5e93fe00d8469fe25d1e194bd9fca67ffa4fbdc99074377b7ff5f3a0c302e962
font_01_sfnt_off0000d43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43D 10072 bytes
SHA-256: 757ba38e16febe14d6363baffe9f41021de3224b22aaac3033733bc5e86bf0a0

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