Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc5b1a134e73170…

MALICIOUS

PDF

224.8 KB Created: 2021-01-30 09:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c5b40836a4b3e8fc2decae99d02c1271 SHA-1: 7d2e781fc0bb2f796e59f54d44a2dbafb1eeaf5a SHA-256: ecc5b1a134e73170499c797963e9e557d4e45eaf8eecd6e3150b62960f6cf75a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs pointing to external websites, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=male+miniature+schnauzer+puppies+for+sale+nc PDF link annotation
    • http://xejevojesinil.22web.org/oklahoma_corporation_commission_form_1012.pdfIn PDF document text
    • http://store50off.info/honda_black_max_mower_wont_starta7zih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_6004dcb3cfcd9.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/hgeqtif/draw_climber_game_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fe90963e6d62.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/7ca07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fc954aeccd95.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/5088307.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/ghy07ii/bubble_hero_2_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/35kjgg5/tornado_warning_sound_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447108/normal_60035cecbbbf2.pdfIn PDF document text
    • http://hookup157.online/zitodaxevosimapovapazekuzk6l57.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwasusul/cXdjev8/86177480192.pdfIn PDF document text
    • https://semanipiji.weebly.com/uploads/1/3/5/3/135312460/jaditeru.pdfIn PDF document text
    • http://fakts.design/tls_tunnel_premium_apkq9u3a.pdfIn PDF document text
    • http://letnesil.xyz/zegunok2d7wv.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/vakus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5ff75986c7a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_600ae03985f21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vunefukovamin.rf.gd/born_to_die_gemini_remix.pdfIn PDF document text
    • http://fujumel.rf.gd/10277631668.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_off00033974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33974 5312 bytes
SHA-256: 62841466102fb846e6a608d149e83999e5a73426e72d532e999c1421496e2310
font_01_sfnt_off00034b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34B6D 11904 bytes
SHA-256: e06b3fb5ee18a1835191592fb298e3185f76140177eb4c92e3fdbb8e22fda22d

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