PDF malware analysis — malicious · 0e34a84800def217

MALICIOUS

PDF

67.3 KB Created: 2021-09-13 11:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 9f70a6866834e335755dcc9838afac59 SHA-1: 5c17b8ce87683ff90e3e72f5bef7588a9671d270 SHA-256: 0e34a84800def2175a59c098280a1ea2331b2eb9fa71b6c97c688c1a383dbfa3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable or unknown domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and numerous external links suggest an attempt to lure users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 4

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://tyko.pl/userfiles/file/24651680365.pdf In PDF document text
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/8fgrf46pao15m79h9vjciku33b/87919358074.pdfIn PDF document text
- http://audiohrestomatiya.ru/content/file/buxosixisi.pdfIn PDF document text
- http://immobilieninvestors.de/userfiles/file/66953867624.pdfIn PDF document text
- https://nhahangphongcanh.com/uploads/files/9062363635.pdfIn PDF document text
- https://aldapa.eus/files/galeria/files/76755739474.pdfIn PDF document text
- http://ciaomamma.hu/editor_up/89978069674.pdfIn PDF document text
- http://ammk.sk/userfiles/file/8234222088.pdfIn PDF document text
- http://huanghels.com/filespath/files/20210907233133.pdfIn PDF document text
- https://careerroots.net/ckfinder/userfiles/files/53892128055.pdfIn PDF document text
- http://wksx.top/images/userfiles/file/toreguliwakijur.pdfIn PDF document text
- https://tessuno.com/upload/files/6132389dcbe02.pdfIn PDF document text
- https://bangvetthuong.com/luutru/files/85771977854.pdfIn PDF document text
- https://shieldtech.cz/ckfinder/userfiles/files/4413445491.pdfIn PDF document text
- http://nicolalazzarotto.com/userfiles/files/wafarom.pdfIn PDF document text
- http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/retorerupopatimiwanu.pdfIn PDF document text
- http://sxnqx.org/upload/file/Fl202109051328552592.pdfIn PDF document text
- http://uralteplostroy.ru/content/file/xoxififigazikefo.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3d20a6c417ffd726c5c3b0b0052ad89e/79850073118.pdfIn PDF document text
- http://pensjonatagat.pl/userfiles/file/23951012342.pdfIn PDF document text
- https://hosrem.org.vn/ckfinder/userfiles/files/wamemuriderizolonegod.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lightroom+cc+app+download+old+versionPDF link annotation
- 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000aaa6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAAA6	11072 bytes
SHA-256: `7bf84d06ee4120d4d8f432b5bec4cbaed7ee4b9a699703d8143efad52430e539`
`font_01_sfnt_off0000c422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC422	14380 bytes
SHA-256: `a96e4d0fa6aa43a5c509597adbd7e5685f4f732f358fadb73e50e3bf160038d9`
`font_02_sfnt_off0000e7e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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