Malicious PDF — malware analysis report

Static analysis result for SHA-256 cece301ba1d85305…

MALICIOUS

PDF

65.5 KB Created: 2021-01-08 14:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 67c7f0979395149ab67af9e0583a1a2a SHA-1: 6873112e43c9af62822399de9d0082f162d638cc SHA-256: cece301ba1d8530592ce07bf37978eacde275a69a378f41ff28cf58c77343c1a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, designed to create a link farm. The document's content and metadata suggest it is intended to deceive users into clicking these links, likely for SEO manipulation or to direct traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate 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
  • 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://traffnew.ru/aws?utm_term=catechism+of+council+of+trent+pdf PDF link annotation
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/zopifoxeke-sorepopunilosiz-vumapetewi-vedonewogofako.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/7uhf9Mx/hello_kitty_cafe_truck_menu_2018.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/7041606.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/4254576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_5fd631ede372a.pdfIn PDF document text
    • https://roguxewotare.weebly.com/uploads/1/3/4/3/134319265/ziraxup-jarabigujolaka-vulukuve.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/E9gi7NA/totuvaloxelexeli.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/chijif5/driving_school_academy_2017.pdfIn PDF document text
    • https://julalawigito.weebly.com/uploads/1/3/4/8/134869680/sodedulumozo-menanagugo-vovuwonewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fa0bf34473b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fdfca4e5e153.pdfIn PDF document text
    • https://fiviwadixuxenel.weebly.com/uploads/1/3/4/8/134854304/5259823.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/pafiganovavi/gemma_hayter_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/82890724357.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_off0000bfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 5300 bytes
SHA-256: 3bde9bc4b2e359b066bfc4ea6d05ab3aa61b7d965289997bfb28959a8ba81c2c
font_01_sfnt_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 11812 bytes
SHA-256: 25fc19f43436ed23c7363c046c634f7ec77cdb6fc57c0767d34bf17e883a4875

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