Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fb4b564fc061ba…

MALICIOUS

PDF

81.0 KB Created: 2021-02-17 07:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e34ae095688f54edc84d6cb8072f76e0 SHA-1: 285a975a37ea384528eded0f72ed166bbdcc9003 SHA-256: 49fb4b564fc061bac1abe3899cfaa43b9d01d08c3e62840f688480159c9e1ab8
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one that appears to be a search result lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=qual+o+significado+do+domingo+de+ramos PDF link annotation
    • https://cdn.sqhk.co/wajerewuwer/QKVRibk/negogagag.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/THZhihe/77134072683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_6013393adcb09.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/ALdihgh/87165681790.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/6IGmKgh/balenciaga_sale_triple_s.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/rhauif6/last_day_of_spring_2020_tamu.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ASnNjfN/zombie_warfare_vr_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_601635abe5cea.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/2Ijgjft/86206356983.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/iiicq3Q/82580716017.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/GgJihTs/13603725399.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/htc_u11_update_android_9_deutschland.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_601fefd311a54.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/classeur_souple_format_a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bazodumijot.rf.gd/analytic_geometry_eoct_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/29602482621.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/54049326358.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/meaning_investigative_reporting.pdfIn PDF document text
    • http://gevorewububew.epizy.com/ridobelomapos.pdfIn PDF document text
    • http://newewixojarulup.epizy.com/jexasekupudarunozog.pdfIn PDF document text
    • http://nikavavufuxirel.epizy.com/wujoruxinusetemugozebo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 5204 bytes
SHA-256: 9862694a85b0740fc46863ce8f7ad0165ebb3344844ba24f785f7368b12e2ea2
font_01_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 13516 bytes
SHA-256: 5111d6e7a684a1d323c443e99ce75d4ef860cd307b3748edeefecdaa9e1e4b90
font_02_sfnt_off000126a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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