Malicious PDF — malware analysis report

Static analysis result for SHA-256 6629c27152664864…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 04:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ec96283e1873b93915c6f24aa943f60c SHA-1: 81bfb0aa17731dd82cb60264e235c3935a934475 SHA-256: 6629c2715266486441495248d09b55effd226d97b7dacc989d8271ed13997cb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=what+is+functional+strength+training+apple PDF link annotation
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/3533830.pdfIn PDF document text
    • https://mugapasuxow.weebly.com/uploads/1/3/1/4/131437627/39a47e7.pdfIn PDF document text
    • http://kiluniv.22web.org/xadodaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/sRYhdhc/ludo_star_2_mod_apk_2020.pdfIn PDF document text
    • https://pijolonaponezu.weebly.com/uploads/1/3/4/8/134879261/06a4b91c33706f.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/5662032.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/jakopulebikijodivafe.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/ijFuhbn/the_trails_apartments_nashville_phone_number.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/fotojipifuzitul/kuligogefuguzifadaboxepog.pdfIn PDF document text
    • http://kokiralasido.epizy.com/cbt_nuggets_free_videos.pdfIn PDF document text
    • http://zobowubi.epizy.com/xebolerur.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/top_text_to_speech_android.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/aviva_online_forms.pdfIn PDF document text
    • http://kugugoroxe.rf.gd/41968115191.pdfIn PDF document text
    • http://wuwovedivaz.rf.gd/bhai_song_whatsapp_status.pdfIn PDF document text
    • http://jorowiwiboxizuk.rf.gd/tefifekak.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/minecraft_launcher_mac_free.pdfIn PDF document text
    • https://en.wikipedia.org/wiki/Functional_trainingInIn 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_off0000dd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD04 5288 bytes
SHA-256: fd8382e7b0edf111c2c200ac6b95de86876a3382f52e558892207f2eac52da52
font_01_sfnt_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 10212 bytes
SHA-256: b7bdbf265270bfa4bbb02fcba1f84209d43369bd42780d9f284bf21001b0322e

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