PDF malware analysis — malicious · 9187db7a585f414e

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 13:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 77c01f08cdd074cf32fd1875fddf228b SHA-1: ac80e748a385edbeb9a66a65f1f61978a11be808 SHA-256: 9187db7a585f414ec0aa0fbdf902db53f82c05430f27a333cdea813ec6dffbc6

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Security Software Tampering

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous links to external sites, some hosted on compromised CMS platforms, and includes an instruction to disable security software, indicating a deliberate attempt to bypass defenses. While no scripts were explicitly extracted, the presence of embedded URLs and the security bypass instruction strongly suggest an intent to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
Security software disable instruction high SE_SECURITY_BYPASS

Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://pixomot.ru/uplcv?utm_term=gta+5+cheat+engine+download PDF link annotation
- http://hbaoge.com/upload/files/85181343574.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/40e8ca1a6d89f06da2db3057e2d78a23/jajeriwuzitopuwiru.pdfIn PDF document text
- http://ersatzmonitor.de/userfiles/file/godivedabuzimejajamogir.pdfIn PDF document text
- http://schokozentrale.de/idata/newofenivikav.pdfIn PDF document text
- http://melodylavernebettencourt.com/media/file/45172704193.pdfIn PDF document text
- https://ochronaskory.pl/pliki_user/File/lojisepeseju.pdfIn PDF document text
- http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/18617331148.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a517d89d51d4dec8d2cfe1135b1a40bc/57274335177.pdfIn PDF document text
- http://polesprogettazioni.com/userfiles/files/xozojejagesewop.pdfIn PDF document text
- http://huyndaicaudien.com/upload/files/2590544066.pdfIn PDF document text
- http://oiseau-bleu-morzine.com/userfiles/file/61931634775.pdfIn PDF document text
- http://olympusflights.com/files/files/68613854296.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161316a31160da---3089935105.pdfIn PDF document text
- https://lideregitimpaketleri.com/calisma2/files/uploads/43890011129.pdfIn PDF document text
- http://paneldeconso.com/userfiles/file/fifuzoxiresifemon.pdfIn PDF document text
- http://pegastelco.com/pictures/files/23880088059.pdfIn PDF document text
- https://ww150002.linebot.net/upfile/files/20210903143158.pdfIn PDF document text
- https://flammerouge.ch/userfiles/files/rezumunosazojimagalogibus.pdfIn PDF document text
- http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/nabidumadepegabibazewan.pdfIn PDF document text
- https://episcopiaoradiei.ro/files/19278142458.pdfIn PDF document text
- http://tercovci.cz/files/file/junuduxozajezugilubogeb.pdfIn PDF document text
- http://gloteckr.com/upload/editor/file/88173248618.pdfIn PDF document text
- http://daiichibus.vn/uploads/news_file/6224158305.pdfIn PDF document text
- http://yonseri.org/userfiles/files/nimazukuzu.pdfIn PDF document text
- https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/59958380440.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_off0000d1d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1D4	20060 bytes
SHA-256: `d66516d1a3edf3bd5510726873c66e13fc8a7707b77d52931802ca85467535ab`
`font_01_sfnt_off0001061b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1061B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E32	10640 bytes
SHA-256: `a5d4dd72277313fdbbebb59d9964aff3b25c3c74fd58b1cf2e8ac9d047681757`

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