Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e2df6f3b6dfc34…

MALICIOUS

PDF

85.4 KB Created: 2021-01-18 03:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 35bb6160a5aacc3cbaa52df02928ad6a SHA-1: 9dc1dbc163975e25b22b18c6a2e8ed25c231cd1c SHA-256: e1e2df6f3b6dfc349637a0207b42aed0b2b649d9e3d5397ff4ce75f49d9074f1
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The heuristic firings indicate a link farm designed to direct users to malicious sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=act+2+popcorn+cotton+candy In PDF document text
    • https://kawigijutugin.weebly.com/uploads/1/3/4/3/134351661/4772613.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/imprimir_curp_nuevo_formato_por_internet.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/luvetilifuwopej_bijupedusen_funobufoj_faviwobaxuwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368485/normal_60011db12fadc.pdfIn PDF document text
    • http://lekezoreg.22web.org/monster_legends_breeding_guide_bonbon.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/4567331.pdfIn PDF document text
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/zarumepiferegor_zoxab.pdfIn PDF document text
    • https://berovifis.weebly.com/uploads/1/3/4/7/134730871/julojoximeg-wetudujawowaxag-nugonijazuso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fcb5ca6a109c.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/9616277.pdfIn PDF document text
    • http://ninudogexefeg.22web.org/47388920113.pdfIn PDF document text
    • https://bavipemafenun.weebly.com/uploads/1/3/1/3/131398101/jopasurepolerif_tebuxukoboz_lodat_fuxuniteg.pdfIn PDF document text
    • https://tanafojapazikop.weebly.com/uploads/1/3/4/5/134576724/zixivamip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_5fb277c209661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/logo_quiz_level_19_answers_by_bubble.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/dizunedizas.pdfIn PDF document text
    • http://xamukuxoze.epizy.com/50037988828.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/renetadulisa.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_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 5080 bytes
SHA-256: 86fd7bb40f2a998234d712e47b7a9d1e7c14459f9b51f18010a89165484e75f0
font_01_sfnt_off0001225d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225D 11356 bytes
SHA-256: 733f4d8a504915267951c700d9095bec7b25895933319c2d9ca1680918c77081

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