PDF malware analysis — malicious · 9ad7a74166c706cd

MALICIOUS

PDF

78.4 KB Created: 2021-09-13 08:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: deb1b91a4d8d838168a9f8bac097b635 SHA-1: f0a6d43d380437b0acd6cb473794d9329bbed7e6 SHA-256: 9ad7a74166c706cdbe312d3b4315044e32385dbf90d86bdd04ed3b3809df8a87

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with attempts to trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 5

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 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://crewmak.ru/uplcv?utm_term=font+files+for+android PDF link annotation
- http://laboratoriologos.it/userfiles/files/sejazepilo.pdfIn PDF document text
- http://jpsacademy.com/slbdavbatala/userfiles/file/guxelebunuxiweboxenaxivu.pdfIn PDF document text
- https://tspinstruments.com/cache/fck_files/file/25651312636.pdfIn PDF document text
- https://xn--p3t29jo1ed4o4xw.tw/upload/files/rarub.pdfIn PDF document text
- http://eyela.kr/uploadfile/fckeditor/file/pemuvepogojipoxonawavavir.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8880de959cb120bbd61bb6a04e503cd9/vevabotenekuvu.pdfIn PDF document text
- http://universalestetic.com/userfiles/file/62174101195.pdfIn PDF document text
- http://abwingstop.com/uploads/files/rokiju.pdfIn PDF document text
- https://ratoempat.com/contents/files/texubelilesus.pdfIn PDF document text
- http://alituncer.net/userfiles/file/kemimezebudipu.pdfIn PDF document text
- https://epponline.com/mentorfinancial/page_images/file/jowubuvijenidofubi.pdfIn PDF document text
- http://eperon-kochersberg.com/img_db/23595820926.pdfIn PDF document text
- http://ipcmanpower.com/admin/style/images/userfiles/file/41227944311.pdfIn PDF document text
- http://naturestuff.nl/siteimages/file/10241589621.pdfIn PDF document text
- http://adimhukuk.com/resimler/files/tamodofinulipefakiwasib.pdfIn PDF document text
- http://studiosiriosrl.it/userfiles/files/jaxuvawokibaxofujudizedi.pdfIn PDF document text
- http://elisa5888.com/shopadmin/upload/files/nonobosarariwajikiwiloxu.pdfIn PDF document text
- http://abwcrainhwy.com/uploads/files/nifesugixojezopujigex.pdfIn PDF document text
- http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/57867835009.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343d599b593---niwuwajaxepunelonini.pdfIn PDF document text
- http://henzefashion.com/userfiles/file/91727856238.pdfIn PDF document text
- http://drigungkagyurinchenpalbarling.org/upload/userfiles/files/kunem.pdfIn PDF document text
- https://wroclaw-effatha.pl/grafiki/file/zurekojozosamevaro.pdfIn PDF document text
- http://softwaretesting.kr/club/data/userfiles/file/20210907055207.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/26523579488.pdfIn PDF document text
- https://privatecambodiatour.com/userfiles/file/16318732310.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_off0000ceb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEB1	17496 bytes
SHA-256: `68102e8fe7b0c46b34893643a3a9ec95498a8f35292d6d9ae5533049e381d6d0`
`font_01_sfnt_off0000fc05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC05	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001141c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1141C	10324 bytes
SHA-256: `8faa2da126c603f638d8bb962cd5a9c7b3b1c6f41b9fe6b64f76a357499d8146`

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