Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ab136d83762844…

MALICIOUS

PDF

59.7 KB Created: 2020-11-10 23:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6c6dad9b4e15ec4db9455b2dafbbe43d SHA-1: 9344809ae8fbebb53b2173d9732aeb7592ec42c1 SHA-256: d2ab136d83762844824ff88cc104e871d1f747cd90bda851d812ef0d8fc1d8af
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/strik?keyword=posiciones+laliga+santander PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5f9aad745e89a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5f9ff056add5d.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f9c925dd2bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5fa6995649f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5fa1506331b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8bc4815d449.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/musezopifumatal.pdfIn PDF document text
    • https://fifevogu.weebly.com/uploads/1/3/4/6/134602809/2048332.pdfIn PDF document text
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/lavorulin_vobotivawepig_tizijuwu_maxakivuxupoj.pdfIn PDF document text
    • https://jagamasukibo.weebly.com/uploads/1/3/4/4/134493784/ronowule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f8c42a0d9141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e42ee67-4bbb-40c3-a849-b388be8c3a13/diagrama_de_maquina_de_estado.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/teaching_to_change_lives_hendricks.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/chancellor_s_list_uno.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_off0000add5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD5 5108 bytes
SHA-256: 595983a2c4e55baa0618493109d08f80cc2fb5fc700e8441548a4080aeb21f3d
font_01_sfnt_off0000bf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF40 10600 bytes
SHA-256: 254f5489ffc72e86cd408a649ec0fd464d294c16a614e07bcf7f712bb421b14a

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