Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec47fd0ee8f77bf…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 12:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2dde0633a6740e546cacb0bf00b9bc3e SHA-1: 7813bea33e567cbe0d9416c4c88c822a61b1477d SHA-256: eec47fd0ee8f77bfb4af4a16c15f4e2630d14c18ebbc42fafb63c4d2d6734494
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to suspicious or disposable domains, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent. The ML classifier also flagged this PDF with high confidence, aligning with the ClamAV detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+is+a+certification+mark In PDF document text
    • http://lnstagram-verifedbadge.com/24640175558mzupw.pdfIn PDF document text
    • http://salea.site/cbse_class_10_science_question_papero6yli.pdfIn PDF document text
    • http://goodnatural.space/motorola_g6_play_att_unlockpylps.pdfIn PDF document text
    • http://golomashvanna.xyz/castaway_cay_map_2017g3g9r.pdfIn PDF document text
    • http://boevoenlp.com/how_to_find_my_transmission_code0c6zl.pdfIn PDF document text
    • http://ig-supportcenter.xyz/kalimba_manualg1582.pdfIn PDF document text
    • http://foodguideblog.com/wapokixujelejie7v72.pdfIn PDF document text
    • http://podipotekoi.ru/walmart_black_friday_11_4_onlinecatpf.pdfIn PDF document text
    • http://kenaxifinot.22web.org/33543557444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fc5e570584b8.pdfIn PDF document text
    • http://cmb-eco.com/59109789323b42pz.pdfIn PDF document text
    • http://websporizle4.com/73142164735rcy21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fd2cdf63772b.pdfIn PDF document text
    • https://fixupikavejezop.weebly.com/uploads/1/3/4/3/134392539/5fe7d8f8d6c3.pdfIn PDF document text
    • http://tevfikyuce.xyz/xujidupiparuxizojelodf0xq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_60082bc2dddbb.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
    • http://pujusojup.epizy.com/35372666920.pdfIn PDF document text
    • http://tavarifa.epizy.com/capital_iq_excel_plugin_windows_10.pdfIn PDF document text
    • http://minizadoku.epizy.com/bifupe.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_off0000cce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE2 4956 bytes
SHA-256: 6e40feef7093122aa8755138068942a1dd8cabb26824daedf11a66a3e7bae3cd
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10416 bytes
SHA-256: 6cf70f4c71d5864ae8362a44fc3bceb27a3d57432267cf970281e84be78c9f45
font_02_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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