Malicious PDF — malware analysis report

Static analysis result for SHA-256 02acf0f569de1c23…

MALICIOUS

PDF

73.8 KB Created: 2021-02-13 12:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bef4bf85d43ce6c8a59334c75881a2f2 SHA-1: 8431cd9173eb51ea274324576651cea71d1e8664 SHA-256: 02acf0f569de1c23421eba1f3dbea493cb1fcf9106469a969d5dfdf6cba7322c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used to distribute phishing content or malware. The presence of external URIs and the overall structure suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/wb?keyword=metformina%20y%20alcohol%20pdf PDF link annotation
    • https://cdn.sqhk.co/nasonamav/jhTgj9p/truck_accessories_calgary_nw.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/mathematics_for_economists_hoy.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/jiiblJ3/red_gumball_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_5fcd3fb33a548.pdfIn PDF document text
    • https://cdn.sqhk.co/jenexovu/LWgcKjb/cut_3d_model_revit_to_rhino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_601627322b54e.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/dLjgPgg/zumonubaponedadibenolejol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_60053f1d0a690.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/jighghh/40242230903.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/eheja5u/teacher_appreciation_week_2019_chipotle.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/julia_anonymous_function_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/nj4A2gd/watasojalobor.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/c2gfgfK/light_up_pj_mask_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/hgJgdgf/jump_ball_blast_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ggijcic/oxygenosadaptive_icon_package.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5ff3da16d606f.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/ih32jb8/dilated_meaning_in_math.pdfIn PDF document text
    • https://pabametutib.weebly.com/uploads/1/3/5/3/135317572/pemaxidad.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/TiaZujg/cross_bridges_cardiac_muscle.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/gofefaliwikabaragesima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rafelisugamiraw.rf.gd/feasibility_study_template_engineering.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_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 5324 bytes
SHA-256: 8834696378ca2250225a38bab92f8de64b1124dea543d32189b54d3d38a6379f
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 11144 bytes
SHA-256: 91ca3c7eeb261451f9a16ff3cc9711ef9bd3e4f7a649b42e32528ca275ed9b77

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