Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedad39ef57a377c…

MALICIOUS

PDF

73.7 KB Created: 2021-02-26 00:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 552a0e160cd88f0c3f85aa92e44fb26b SHA-1: b6202045444ec6fccc2c0d2efbe08de310dd099c SHA-256: cedad39ef57a377cd5dcabc9d3a4269e8342724403b68a137d72aa661e2bbfe6
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a common search query, directing users to potentially malicious websites. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users.

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 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://seumenha.ru/strik?utm_term=what+does+it+mean+to+dream+of+a+spider+crawling+on+you PDF link annotation
    • http://f1l3download.site/why_does_my_sewing_machine_keep_beepingdves0.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/vVdcjjm/52212080097.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/bQedtjf/voice_typing_keyboard_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/Cdhfwp2/xenef.pdfIn PDF document text
    • http://tramlaweq.online/kapuradagona4nrrn.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/tutorozufotejewumoz.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/nipelir.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/jcjcidA/5934941313.pdfIn PDF document text
    • http://kataeta.club/421120918254voht.pdfIn PDF document text
    • http://keysecret.ru/senior_consultant_resume_templatetoh47.pdfIn PDF document text
    • https://cdn.sqhk.co/vavapezami/dGwqCFr/talking_cat_tina.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jR1VhgV/ligolejebad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafonabikox.rf.gd/wifafidatu.pdfIn PDF document text
    • http://falivodekolulo.epizy.com/coke_bottle_vector_free.pdfIn PDF document text
    • http://nidudovuj.epizy.com/gcam_camera_apk.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_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5776 bytes
SHA-256: 78e355b1fda1f6e3269d48065506408f5d61384e5cdaf45468785e8968df944c
font_01_sfnt_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 10520 bytes
SHA-256: 33627c3a58199f7c8ba1770414258e20e9481e736064a8055ba981e795c19446

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