PDF malware analysis — malicious · b036a2ae32bd8d46

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 19:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 5adf0b34cef12184f967b58ff9613125 SHA-1: 0898cf5548482830d16551fbfe5fd0f6d7f94ee2 SHA-256: b036a2ae32bd8d46b593adf0621c86f7e45d1b00dcc6b72ff3ef2649fe0c3a37

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains multiple external links, including one that functions as an SEO redirector for a 'free-download phishing' scheme, directing users to a suspicious URL. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and references the '10 day green smoothie cleanse pdf' lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://soxebez.ru/strik?utm_term=10+day+green+smoothie+cleanse+pdf PDF link annotation
- https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/wuvugakokomowe.pdfIn PDF document text
- http://reduslim-shopofficial.site/mixubria1z.pdfIn PDF document text
- http://lenudes.com/15730928770od2ru.pdfIn PDF document text
- https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/c9dd5d7.pdfIn PDF document text
- http://hiziryigit.online/bo4_zombies_classified_guidewj1t1.pdfIn PDF document text
- http://fertpin.online/diplomatic_answer_antonymerkux.pdfIn PDF document text
- https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/8157470.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://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_4e51ab8d1bf04c79bd036d83b38fa0f8.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fopalew/polaroid_wall_template.pdfIn PDF document text
- https://s3.amazonaws.com/wizomoravazub/3929977345.pdfIn PDF document text
- https://s3.amazonaws.com/pokorevalaxex/fubapubilamesavu.pdfIn PDF document text
- https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_9481ddbabc25454fad046c010817f025.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wewuxuviwar/65425622922.pdfIn PDF document text
- https://s3.amazonaws.com/luxaduzimase/24187167175.pdfIn PDF document text
- https://s3.amazonaws.com/lovomijelun/70118474079.pdfIn PDF document text
- https://s3.amazonaws.com/gedesisumi/55117474454.pdfIn PDF document text
- https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_f80df8ee596b4aff88e5e1686532573a.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/likerajatob/global_reporting_initiative_meaning.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_off0000f62f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF62F	5556 bytes
SHA-256: `42e78a5d62daba8bbf1bb61051bb6f7a286dc0cabc412c1528a8cfa30198b51f`
`font_01_sfnt_off000108e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108E5	11500 bytes
SHA-256: `9731c71d058b836a158e9699a60ffe8ade97642672319e401e6a1013267487b0`
`font_02_sfnt_off00013058.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13058	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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