Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48742cfb8f73b79…

MALICIOUS

PDF

41.7 KB Created: 2020-11-04 21:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6dbf8a3846131d2f9e7e0bc3ad5c2cc3 SHA-1: 2ba65bc274e0275e1ac2876dd69cfaced9bfe25f SHA-256: a48742cfb8f73b79a124d2b5ed3824703e0c439c69dc1cb908e53088a99ee3d9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One prominent URL, 'https://cctraff.ru/strik?keyword=dominion+energy+sco', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Dominion energy sco' and appears to be generated by wkhtmltopdf, suggesting a lure to trick users into visiting malicious sites for potential credential theft or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=dominion+energy+sco In PDF document text
    • https://nezumise.weebly.com/uploads/1/3/4/2/134265586/b8c4a04d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f90498d48216.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/9654352.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/fugajax.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/zuxifosepukemaw.pdfIn PDF document text
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/lakadogajej_finasozobexe_dosupapagul.pdfIn PDF document text
    • https://vudelugofede.weebly.com/uploads/1/3/4/3/134383428/bixatuwidibulefap.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/jafitetelana.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/fufaxutuxofetif_gofoge_pijedusukeson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5f9e2829a0eec.pdfIn PDF document text
    • https://pekubitox.weebly.com/uploads/1/3/4/4/134477952/5880353.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vunud.pdfIn PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/0d2666b1.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/biwubeleba/gobelozef.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/53519218316.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zedowufojov.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_off00006379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 4980 bytes
SHA-256: 058192684d6789ba2a91bde41a30358fc22e5b18e7a1cd2c2a7d3893d0f63a6f
font_01_sfnt_off00007470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7470 10952 bytes
SHA-256: 0fcb1e0937eff10d10a800cae3782ab05afbbc53c02dde687ec674d89538b7f7

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