Malicious PDF — malware analysis report

Static analysis result for SHA-256 e365ff43795e5703…

MALICIOUS

PDF

90.9 KB Created: 2021-04-07 04:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 17a90c998ced215bed065d3e9693377b SHA-1: b07bd9612e044a41e3c793bc0162660834cba015 SHA-256: e365ff43795e57038157e600bb9642a162107498bdfdd5ee3fe088ab1576dc98
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 0.9996

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://jumiwimov.ru/award?keyword=sandals+antigua+map+pdf PDF link annotation
    • https://cdn.sqhk.co/madumubo/Piehjia/tiny_home_builders_in_central_florida.pdfIn PDF document text
    • http://koreanluxe.com/86704609599vrt5p.pdfIn PDF document text
    • http://wiinorama.fun/good_tan_dog_namescljoo.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/89424125671.pdfIn PDF document text
    • http://trokot-online.xyz/can_i_watch_hbo_max_on_my_apple_tv_appoxg5a.pdfIn PDF document text
    • https://cdn.sqhk.co/xapewiwud/e8hf5GG/now_goal_live_score_apk.pdfIn PDF document text
    • http://getplafond.xyz/replication_in_prokaryotes11v3y.pdfIn PDF document text
    • http://virnet77.ru/bengali_pc_movieqpmtc.pdfIn PDF document text
    • http://opensol.xyz/lolawdaldh.pdfIn PDF document text
    • http://kieverts.xyz/48086128393f2d9d.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/2u0Zheb/bijivilosobop.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://devlp.design/preguntas_capciosas_con_respuesta_para_pensar3l9e8.pdfIn PDF document text
    • http://hushseo.online/harley_davidson_service_manual_free65910.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/kijhayM/stormblades_apk_full.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/jebokizez/diabetes_mellitus_guidelines_nice.pdfIn PDF document text
    • http://dazejifudora.onlinewebshop.net/54786966621.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/tedofeburipujonin.pdfIn PDF document text
    • http://muzizax.rf.gd/abacus_practice_worksheets_level_1.pdfIn PDF document text
    • http://mexawuzemogo.epizy.com/apache_tomcat_9_documentation.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/arbys_breakfast_nutrition_calculator.pdfIn PDF document text
    • http://lejemerane.epizy.com/33865421209.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_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 5368 bytes
SHA-256: 5273b5bb97f6f3036eae4555c379e75cbfc0b55a3b8b3162a488c60f07bae89a
font_01_sfnt_off000136a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A1 11592 bytes
SHA-256: 3b5b1a5a892deacc9c5f504686d29fe986b9647a3c25268bcffc3c5d5b70a6ae

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