Malicious PDF — malware analysis report

Static analysis result for SHA-256 225bf5db676e2459…

MALICIOUS

PDF

78.5 KB Created: 2021-04-13 18:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6cbfb387b7b03e9f5c3b5133869bba1c SHA-1: df39e7a169fe5fbde8a8d8074aec4f5aa93a3905 SHA-256: 225bf5db676e2459d42c2de5cb1f1676b369843ad4c711c07cfcbcb176ef9022
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an external URI and an SEO redirector link, both pointing to 'https://seumenha.ru/strik?utm_term=how+to+fix+leaky+bathroom+faucet+handle'. This indicates a phishing lure, likely attempting to trick users into downloading further malicious content or submitting sensitive information. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=how+to+fix+leaky+bathroom+faucet+handle PDF link annotation
    • http://gogodolajukapob.22web.org/zavowogatuzanixaxa.pdfIn PDF document text
    • http://midopan.iblogger.org/11th_zoology_practical_book_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/dowhfhe/21298898877.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fdd9702c1288.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60490d0018b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_6069a242976bb.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/dhduItM/42999397444.pdfIn PDF document text
    • http://price-list.moscow/362865330272kqwn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fc95ca13bc6e.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/zWgctB4/baby_s_day_out_full_movie_720p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_604d4dc15b35b.pdfIn PDF document text
    • http://select-get.top/jinofexurilif66qnp.pdfIn PDF document text
    • http://risejesifisem.22web.org/dlink_dir_615_manual.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/livivuvuwugeb/68528599387.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/50102873721.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/23314009437.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/sujoxukorazeliresozib.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/biblia_de_referencia_thompson.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/medical_school_interview_ethics_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/3629854679.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/20032236383.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF541 5508 bytes
SHA-256: ef2ee648f959d99cae918ae081c2880ddb3ab7980ad1b549ae9ad1ad3dfa3b3d
font_01_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 10668 bytes
SHA-256: 6e817dbb7832197c6404e6e47b29e43608ca67e5dc4438cb8a103d834974115f

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