Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b0c02e41b10ef1…

MALICIOUS

PDF

86.4 KB Created: 2021-03-29 11:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4b1fc0abff6f0ced5994cd4e337ef37b SHA-1: 01d5b57d73d564a13b1c8f57371cba1e7ce6b2bf SHA-256: 28b0c02e41b10ef19129c05ecd1baa6fbfa86d65eddad059aa0cf2bced77315f
134 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the document's structure and embedded URLs point towards a lure for downloading a second-stage payload, likely related to the 'mini militia mod apk hack' keyword found in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=mini+militia+mod+apk+hack PDF link annotation
    • https://cdn.sqhk.co/tixukiko/hjajaia/never_have_i_ever_questions_dirty_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_6000b96bab6ce.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/90537757103.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/how_to_eat_a_mediterranean_diet_without_fish.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/jhcifhc/kapefediwipizijilekiba.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/botany_for_degree_students_by_a_c_dutta_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495681/normal_5ff4db9d5f1fa.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/47009829289.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/medaliwifufugel/55643336001.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/48404245003.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_5b382ff3073f4070b34112db6a8e8d68.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_8a3d24b4c9564a2c9bd1d1b767db0df9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/live_tv_apk_uptodown.pdfIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_7bc1f11c35be4f599141b865db24be72.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_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 4776 bytes
SHA-256: 2486a86b3f726d2cdd51161390985be437e2668345585ab56694b2f96fa28351
font_01_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 11252 bytes
SHA-256: b0befe20f0d70f395de7427993a8c7634f226e793c0c5446e5a3f3c49ea8e330
font_02_sfnt_off00013f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F02 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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