PDF malware analysis — malicious · 3dbf1e331b50fccb

MALICIOUS

PDF

81.5 KB Created: 2021-03-07 22:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: c51479fd2e121967df77d80eef7cce9e SHA-1: bb8d71c113490e8b978d827ed36099c676ec9aee SHA-256: 3dbf1e331b50fccb6e47b4ea4f511fea9f4cf6198c14c143ff61ed604df4b914

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to starting a Lexus without a key fob, suggesting a lure. The primary IOC is a URL that appears to be an SEO redirector, likely leading to a phishing or malware distribution site.

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://xajibur.ru/strik?utm_term=how+to+start+2006+lexus+without+key+fob PDF link annotation
- https://static.s123-cdn-static.com/uploads/4459057/normal_5fed56883ca74.pdfIn PDF document text
- https://firatilis.weebly.com/uploads/1/3/4/6/134689017/ae58cf0d1007eaf.pdfIn PDF document text
- https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/kugufumuma.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415754/normal_60074d16c6744.pdfIn PDF document text
- https://mudituzeko.weebly.com/uploads/1/3/0/9/130969310/0ccb1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402737/normal_601c686c2f8c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386080/normal_6013364b5948b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418963/normal_600753bc2e148.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448110/normal_5ffc0ddc30289.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_63b7bf311edd488ba9e99048bcf828c6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/davolazupivowi/define_coliform_in_biology.pdfIn PDF document text
- https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_f3d38214754d437cb488737c6c70c56e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vutame/c_openxml_create_word_document_from_template.pdfIn PDF document text
- https://s3.amazonaws.com/zunaduxa/impact_national_geographic_learning.pdfIn PDF document text
- https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_37aac57f6ce7422da1cf93f787c7640d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/roxawo/red_formal_dress_makeup.pdfIn PDF document text
- https://s3.amazonaws.com/vapelurowar/52937520238.pdfIn PDF document text
- https://s3.amazonaws.com/sagotomagin/happy_birthday_to_you_ringtone.pdfIn PDF document text
- https://s3.amazonaws.com/telasebisu/buxitunaj.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0CC	5488 bytes
SHA-256: `9bee02770e6c4363e8c7d329cf59cbc6e6f7c07aff78c5c9b4ae8b32e2648e61`
`font_01_sfnt_off0001039b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1039B	11296 bytes
SHA-256: `5154ead0fbf3ed00965b9ab01e3a2d1e4271eeffd6b20f55bff62dcddd702f16`
`font_02_sfnt_off00012a2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A2F	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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