Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec28bc148de5cb8c…

MALICIOUS

PDF

78.1 KB Created: 2021-05-02 00:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 49d6a355c2efebe51e0fcacf18d66603 SHA-1: c5bb15809995534295ef0e823f077a4b9afbfba1 SHA-256: ec28bc148de5cb8c2c1f7c8b818b75184ef04d344a7f6db918676625ba2a9f58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the PDF structure indicate a link farm designed to redirect users to potentially malicious sites. Although no scripts were explicitly extracted, the PDF's nature and the presence of numerous external links suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=fishing+gear+for+speckled+trout PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fcd039f64780.pdfIn PDF document text
    • http://reduslim-official.website/sch_sinh_hc_campbell_ting_vityqpn0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5fc7a72aa9c58.pdfIn PDF document text
    • https://zoxuzula.weebly.com/uploads/1/3/4/4/134489613/4283396.pdfIn PDF document text
    • https://zozizifubigidoz.weebly.com/uploads/1/3/1/4/131409074/kiwuxulovi-vonivan-lukivunibeji-fakoloviwuvo.pdfIn PDF document text
    • http://baltika-trans.ru/tolotabogilelajuze79yem.pdfIn PDF document text
    • http://romeita.fun/lileputurolibey088a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_5fd6484db6181.pdfIn PDF document text
    • http://betflixguvenilirmi.com/bonetale_android_hack_apk5gd8m.pdfIn PDF document text
    • http://wiinorama.website/79905056108kfg12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_5fea1e881cd38.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/jokemikofa.pdfIn PDF document text
    • http://kilekapalovuzo.getenjoyment.net/important_days_2020.pdfIn PDF document text
    • http://verifybadgehelp.com/gunship_shooting_strike_battle_apkyiszk.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/775358162.pdfIn PDF document text
    • http://naturfresh.space/27173462528ucfto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefilodeza.myartsonline.com/viloregerada.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_158ef450bf124958b6bc5e6607c5acc5.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_1fd6a92986b64f07ad8e410957e57bd7.pdf?index=trueIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_fff6a1424e62486b9ca9bf3deb8a23e7.pdf?index=trueIn 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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 5436 bytes
SHA-256: 34b27108cea0b4d57825ed7406c23192c77542826a345114aa9336fc0542e4af
font_01_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 11284 bytes
SHA-256: 8a4bbe84ebea7adecd16bb4648d1de824a728b9f376ef46f0244879e6d319758

Open this report in the interactive analyzer, or submit your own file for analysis.