Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e07374bc90d35c…

MALICIOUS

PDF

73.8 KB Created: 2021-06-12 19:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9bb1b1a22362428e737baeeec8bccc8b SHA-1: f298abeb6cb4922bef9a276554b6f5e8c040fac6 SHA-256: 75e07374bc90d35ce655f6aaaef892f0165b0501d5c7dd67ac3178285011c263
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as https://philabc.ru/pbw?utm_term=animated+ppt+templates+free+download+for+project+presentation, are likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://philabc.ru/pbw?utm_term=animated+ppt+templates+free+download+for+project+presentation PDF link annotation
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/3096804.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/fb74c6a51a7b50.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/74866.pdfIn PDF document text
    • https://xaxunuvupewiro.weebly.com/uploads/1/3/3/9/133997201/gopar.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/sexafes-xunizipiro-mokuvazojuwosef-netorerewifi.pdfIn PDF document text
    • https://komojagalon.weebly.com/uploads/1/3/4/8/134885500/rasadiv.pdfIn PDF document text
    • https://wupebeziwemipi.weebly.com/uploads/1/3/5/3/135315897/491706.pdfIn PDF document text
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/dagijaxux-wuluxiwu-lajomowizojex-sixesobolola.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/vutej_ririzidonubi_sizoku_zuropizi.pdfIn PDF document text
    • https://nunamazo.weebly.com/uploads/1/3/4/3/134311680/3522138.pdfIn PDF document text
    • https://purigimotefejis.weebly.com/uploads/1/3/4/3/134308192/gamobo_fosibiwivap.pdfIn PDF document text
    • https://talosemes.weebly.com/uploads/1/3/4/4/134494853/6212919.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/nifopojaremu.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/d258b59f-e4b2-4620-bdda-b5f5ca9398d1/zivubatuviwilogagof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c65596d-17b6-43bf-86c8-d531165bd166/60494269974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7e1d2f-f8cf-4da1-bc93-c43c3ef8e2a2/el_principito_libro_original_resumen_sobre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75049421-e809-429e-9b85-d6e025f37cd5/67145022069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8190df2f-4753-4fce-b8ea-163c8e179aca/pamewedo.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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 5456 bytes
SHA-256: 6e7de80a41229238cadfea867d9427e5e84c9ce92074739c297bfb5e089b3443
font_01_sfnt_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 10668 bytes
SHA-256: d01ae5f6b9f7edf0422fde08a6ef5e120375253569cfab1fadebf303c593b33a

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