Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7cca5a2c72c42f…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 11:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5ab140db71f68ae6fd969a6cc6e1a05 SHA-1: 2cad4b5a0069812ca4b0b571b3a853537a15f929 SHA-256: 0c7cca5a2c72c42f5178ad10a1e4cb75c4610513b7b16db49d8bccd8ca1f7338
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=the+mind+diet+book+pdf PDF link annotation
    • https://cdn.sqhk.co/karopepagu/jjKcxFs/whitehat_jr_book_free_trial_class_now.pdfIn PDF document text
    • http://legalvictory.group/80265300797iqkdv.pdfIn PDF document text
    • http://d-youtube.com/watofetigowebvyjyv.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/uniform_crime_report_by_state.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/aZhhshc/laderekatipesafudodadup.pdfIn PDF document text
    • http://jijabewifomemab.iblogger.org/xaragavajobaputulebunob.pdfIn PDF document text
    • https://cdn.sqhk.co/kowazodonaf/EoA3ggt/97915019912.pdfIn PDF document text
    • http://thepropheticapp.com/nepilebudufomukimogrcemu.pdfIn PDF document text
    • http://graatorama.fun/karimnagar_bandi_sanjay_anna_songs_mp31dfun.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/TIyifnq/transfer_case_problems_ford_f150.pdfIn PDF document text
    • http://vabodulesofife.22web.org/pavex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_080add9c11914fb798015ef6318add38.pdf?index=trueIn PDF document text
    • http://wemiwapava.epizy.com/crinkleroot_s_guide_to_animal_habitats.pdfIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_3d5a865d4f10465fab7c51238c90b359.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/78887190288.pdfIn PDF document text
    • http://nolepukopele.epizy.com/8193510466.pdfIn PDF document text
    • http://watawazorino.rf.gd/hey_siri_call_my_girlfriend_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/xelurokozotugune.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/fevitofazil.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/disaster_contingency_plan_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 4916 bytes
SHA-256: 745db7b605d14d95bd3937b29ef10d764c52182f0df6dc0557afd0cae5e9b409
font_01_sfnt_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 11188 bytes
SHA-256: 218dd99f9c5b1aa3d255f2a22494b161fd13a7212a0d934ea3afd4e4c93fa712
font_02_sfnt_off000128b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B0 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89

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