Malicious PDF — malware analysis report

Static analysis result for SHA-256 396dce7ad775e143…

MALICIOUS

PDF

69.3 KB Created: 2021-03-18 01:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408fc45d37c745db81f8bbce2be728a8 SHA-1: 78bc949acc1dba21516a01e8726bad860d202d7a SHA-256: 396dce7ad775e143b28dfc5471fb40abf0dbba35ee29f776e9d5e16f55b3afe5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as book titles or articles, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=psalm+91+esv+bible+gateway
    • http://kemedejovon.getenjoyment.net/el_poder_de_cambiarlo_todo_libro_gratis.pdf
    • https://cdn.sqhk.co/pobumepova/cjcieiw/nexovezadepefu.pdf
    • http://lenuvivureropi.scienceontheweb.net/xuxudulosa.pdf
    • https://cdn.sqhk.co/luwesefizi/7icgdid/diy_craft_ideas_for_adults_pinterest.pdf
    • https://cdn.sqhk.co/kuregemuwu/ajchihg/adventure_movies_2017_free.pdf
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/ff7b2e7d.pdf
    • https://cdn.sqhk.co/zokosofu/gcgezw1/52347725460.pdf
    • https://cdn.sqhk.co/jememobak/ghb6he1/work_from_home_jobs_online_legit.pdf
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5fe24710d22bd.pdf
    • https://cdn.sqhk.co/litopozuf/jhMbjgD/entry_level_social_media_marketing_jobs_nyc.pdf
    • https://lakomefolowe.weebly.com/uploads/1/3/0/7/130776578/vonuki.pdf
    • https://cdn.sqhk.co/fasazani/gfz0geB/super_kart_for_sale.pdf
    • https://cdn.sqhk.co/zesonixiv/djdhigf/kafuzu.pdf
    • https://static.s123-cdn-static.com/uploads/4454821/normal_5fff5a87d11e7.pdf
    • https://cdn.sqhk.co/neviragar/igLijjf/city_s_edge_warsaw_mo.pdf
    • https://cdn.sqhk.co/vumojakizaw/gjc6WKP/oil_and_gas_exploration_problems.pdf
    • https://cdn.sqhk.co/sofaxuleruri/jj9qjal/survival_craft_apk_pc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kitilogokufalu.atwebpages.com/sozufawu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d411.bin
a758b8600f95782b9ebdeec3b8bd4bdb257fe5e37e16aee007c338fcc470e948
pdf-font-stream PDF embedded font (sfnt) at offset 0xD411 5512 bytes
font_01_sfnt_off0000e6e7.bin
30ab7e814685528c964d5ea24dc234cdf747e2d130156e243a02ab1dda264ec3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E7 9644 bytes