Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fc61425f424d4d…

MALICIOUS

PDF

69.0 KB Created: 2021-02-18 21:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 26d8b3b7b0b3958d6f6030494dc7e549 SHA-1: 0044a8d45389dff5533b305734ae42d40613129e SHA-256: d4fc61425f424d4d245f70ec1731bc61faf0d7775cd05b1eeebf7f32fe085921
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. The document contains numerous external URLs, many hosted on disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious intent, likely to exploit vulnerabilities or trick the user into further interaction.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/wix?keyword=porter+cable+router+edge+guide+42690 PDF link annotation
    • https://cdn.sqhk.co/jawuraxexije/RUjizWi/83661211170.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/eUwZUhi/vewasalapuledel.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/jowupulatud.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/pumasanawafef-demer-rokowivodepelid-xolumironisud.pdfIn PDF document text
    • http://usechambre.xyz/10_facts_against_school_uniformsfyytv.pdfIn PDF document text
    • https://zodosixuwe.weebly.com/uploads/1/3/4/8/134863902/rirevaxatibutugijofu.pdfIn PDF document text
    • http://anarchymedya.com/mowotazipaditoh5o9d.pdfIn PDF document text
    • https://zubikuzo.weebly.com/uploads/1/3/1/4/131453486/nowiguvof.pdfIn PDF document text
    • http://podcard2020.site/vidugavt0us3.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/e4gcvij/truck_road_16_most_dangerous_game_download.pdfIn PDF document text
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/1452867.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/TiakHib/carmageddon_2_windows_10_no_sound.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426073/normal_5fcdf26f8b6f9.pdfIn PDF document text
    • http://return-0.com/to_take_in_japanese_te_formleuja.pdfIn PDF document text
    • http://my-favshope.online/the_features_of_a_newspaper_report_ks1r7vf2.pdfIn PDF document text
    • https://tijanowu.weebly.com/uploads/1/3/0/7/130739502/3582459.pdfIn PDF document text
    • http://rollernefritmassage.xyz/bsc_ka_full_form_kya_haiu1dy3.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_off0000cf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 5744 bytes
SHA-256: 3de9493f3364acdd137144930dbdf1416355bbd45a309c3cbcf5622c44100596
font_01_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 10592 bytes
SHA-256: 6c191609123cb47059e222269cbc10b55d8bcb661a7a59415282940dbe33f13c

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