PDF malware analysis — malicious · 0e5053fc70776c16

MALICIOUS

PDF

67.6 KB Created: 2021-09-25 20:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 565d8d3ddeb6dcd414143281a25dc9d1 SHA-1: 8acb2538f7bed95c0d075a58bcdcae9f5ae95509 SHA-256: 0e5053fc70776c1678214918b9835edd4730cbd44b330c23f389dbfc76196359

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF is identified as a malicious phishing lure due to its structure, containing only an image and a clickable action. It leverages multiple external URLs, some of which are hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://queure.ru/uplcv?utm_term=liloan+cebu+zip+code PDF link annotation
- https://lostfoundglobal.com/userfiles/file/wofofij.pdfIn PDF document text
- http://pop-around.com/file_media/file_image/file/pimesomijowirefujeroj.pdfIn PDF document text
- http://evolution-dev.com/file_media/file_image/file/40886129617.pdfIn PDF document text
- https://phm.vn/upload/files/riniwegisasakoto.pdfIn PDF document text
- https://combrooncom.com/contents/files/801829487.pdfIn PDF document text
- http://thaide.org/userfiles/file/rodabakaxudopabipesadu.pdfIn PDF document text
- http://around-sicily.net/userfiles/file/wakovib.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/vavujenorenemavumigise.pdfIn PDF document text
- https://ihotel2b.com/upfiles/editor/files/rovigifarurenipobuzu.pdfIn PDF document text
- http://s-privod.ru/userfiles/file/43851044349.pdfIn PDF document text
- http://mertcelikkapi.com/userfiles/file/fofidapo.pdfIn PDF document text
- https://sayurhijau.com/contents/files/89794625837.pdfIn PDF document text
- https://burstallconrad.com/editor_files/file/63131401116.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16144a33876635---tazareguxedudosifaf.pdfIn PDF document text
- https://shidoremicrosys.com/media/lidaj.pdfIn PDF document text
- https://artgallery.devctn.com/ckfinder/userfiles/files/12128752444.pdfIn PDF document text
- http://etoprosto.ru/ckfinder/userfiles/files/92115408906.pdfIn PDF document text
- http://hondatayho.top/img-ngocbao/files/32056340181.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/018143c19abf8fe32f65d7730ec4a3b3/4849141595.pdfIn PDF document text
- http://atdawnwelift.com/userfiles/file/tikosoruxokot.pdfIn PDF document text
- http://connect-event.fr/ckfinder/userfiles/files/nekivek.pdfIn PDF document text
- http://blekinge.boj.se/uploads/userfiles/files/xemiwa.pdfIn PDF document text
- http://majstrissmt.eu/www-data/file/10179725676.pdfIn PDF document text
- https://alpinismbihor.ro/app/webroot/files/userfiles/files/wolin.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://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_off0000adbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADBD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c5cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5CF	14260 bytes
SHA-256: `0dd3261fc57be02c97f57c574de87c7ec6661fe616c5de36fb5e4a066e9ce214`
`font_02_sfnt_off0000e967.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE967	10396 bytes
SHA-256: `d8d1712b2776ac654fe13d2fe58810dbeb22b765fef19a40ab67a999081625f0`

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