Malicious PDF — malware analysis report

Static analysis result for SHA-256 00645105a71fc664…

MALICIOUS

PDF

111.7 KB Created: 2021-04-01 00:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78be25799b327424f201933323fe6790 SHA-1: c607aec2b9ccd278c0190ee5ce2329592452ba53 SHA-256: 00645105a71fc664809a04bc82747e12b0d530b8f5d99eaa54b92bf3b69dcafb
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-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.
  • 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://soxebez.ru/award?keyword=%25C3%25A9nergies+renouvelables+maroc+pdf PDF link annotation
    • https://kijeluve.weebly.com/uploads/1/3/4/2/134266469/ab3965bb8f.pdfIn PDF document text
    • http://vuliduku.22web.org/23024406730.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/EgijhjL/54989659497.pdfIn PDF document text
    • http://theboldpantsproject.com/boss_fs-6_footswitch_reviewr8dkt.pdfIn PDF document text
    • http://raifaisentapp.online/colt_express_board_game_for_saleb1xg3.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/2hcAhjx/17444658916.pdfIn PDF document text
    • http://eurosett.net/42905341079m0t7y.pdfIn PDF document text
    • http://bullbananavannaone.xyz/que_son_las_palabras_de_enlace_en_un_mapa_conceptualmuek9.pdfIn PDF document text
    • http://koolmaxt.online/bojapesfuptb.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/0f392.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/c065f8f10b7e2.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/bgfEkia/nagewoliwewitebodawu.pdfIn PDF document text
    • http://uscarins.info/xijanezudolipanazamuzajrkfp.pdfIn PDF document text
    • http://fedajoxoxa.iblogger.org/how_to_scan_legal_size_documents_hp_officejet_pro_8600.pdfIn PDF document text
    • http://boomerangoo.site/48746290568vs6gx.pdfIn PDF document text
    • https://cdn.sqhk.co/zemakojunil/jgdggic/50510318802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/john_deere_316_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/13093363211.pdfIn PDF document text
    • http://pazutoxun.epizy.com/startup_business_plan_template_word_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/18513622889.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/62912722140.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_off00017283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17283 5656 bytes
SHA-256: aabc93e69eaff36e9c18e1bb269d4e9739792c77ea4a532d306bd61702607ff5
font_01_sfnt_off000185c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185C0 13116 bytes
SHA-256: 3f29cdcea4a7699b9ce63463a978f08f40eaff67d30cf856acf53aafae948c8e

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