Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6c09b3c2da7189…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 00:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13e9ae7022932be1b4f1f52f891e89fc SHA-1: 947c2e0ca8dcf1de0aab725d59d6aec213ee8889 SHA-256: 2a6c09b3c2da7189e37e6084ffacee670851068a3728a589fe336bf8a1b25a22
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/award?keyword=wrist+strengthening+exercises+for+carpal+tunnel+pdf PDF link annotation
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/golaxubo_mibawuzalox_susanone_lesulovodaj.pdfIn PDF document text
    • http://bojexatonumeme.iblogger.org/active_passive_voice_questions.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/tibepolebawibi.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/4295457.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/3HZgclR/98673123947.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/11422296219.pdfIn PDF document text
    • https://cdn.sqhk.co/mobixipotex/zhajgb6/city_harvest_church_live.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/gijaveramex.pdfIn PDF document text
    • https://zunuposegilidus.weebly.com/uploads/1/3/2/6/132695990/ropokivupe.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/what_constitutes_a_breach_of_trust_and_confidence.pdfIn PDF document text
    • https://birulivalofa.weebly.com/uploads/1/3/4/0/134013213/jarezu-lufegare-zuvezujo.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/jalefes_nawuzepub_kezila.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/polyploidy_in_plant_breeding.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/how_much_do_trane_hvac_systems_cost.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/xizibodej-girabibawutizot-bilegofob.pdfIn PDF document text
    • http://julozagoren.22web.org/instagram_post_template_photoshop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagafutufuj.rf.gd/dotisezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40fd0cb-f342-4292-8e8b-b3cccba06de3/bokaruroromawasoxujegij.pdfIn PDF document text
    • http://dajupolix.rf.gd/cultivos_de_arroz_en_japon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889ebef1-22f6-4613-8c41-0f5d2801761b/the_reluctant_fundamentalist_full_movie_online_free.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_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5496 bytes
SHA-256: 6d66ae3de2b68ff76af5a6f408be859f5691f43dbc1832f56d6a2d7f4f27592f
font_01_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 10184 bytes
SHA-256: c1ab76d58dc63f99769293618f7c7c8979eb50e4d91dc41481b9d31a16c1d87a

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