PDF malware analysis — malicious · 6ba0d9dcbf5e7411

MALICIOUS

PDF

90.2 KB Created: 2021-10-08 16:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: bee94f78f24ff3d5850fc4dcd0163603 SHA-1: 5047a011569356755902941a44d5b2b0de239690 SHA-256: 6ba0d9dcbf5e741157e763727429ff26b1a7d133cb10a574617eb37f5bc46c9a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The PDF contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic strongly indicate the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=simple+straight+line+drawing PDF link annotation
- http://daming-school.com/userfiles/file/pojuxonufijuxomoxa.pdfIn PDF document text
- http://daiichigroup.net/uploads/news_file/34834028794.pdfIn PDF document text
- https://magicdiscoradio.hu/userfiles/file/89421959885.pdfIn PDF document text
- https://heart-calligraphy.com/uploads/files/202109201719239448.pdfIn PDF document text
- https://kligi.viart.lt/ckfinder/userfiles/files/vusoxipawuzexezokemolilu.pdfIn PDF document text
- http://uniquehotelsolutions.com/files/others/tokeviginijak.pdfIn PDF document text
- https://pvcmikser.com/upload/files/50505509873.pdfIn PDF document text
- https://havilahbuilders.com/userfiles/file/jupelexefazinosiru.pdfIn PDF document text
- https://yodishit.com/uploads/userfiles/file/89725534008.pdfIn PDF document text
- https://sieuthimayphat.com/ckfinder/userfiles/files/66047072127.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425bfac0e42---78337663909.pdfIn PDF document text
- https://rinducm1.com/contents/files/kigavofexurila.pdfIn PDF document text
- https://conrays.ru/f/data/fijodaz.pdfIn PDF document text
- https://www.aicsmindia.org/ckfinder/userfiles/files/zebogamigulipaza.pdfIn PDF document text
- https://wintechindia.in/ckfinder/userfiles/files/59340139764.pdfIn PDF document text
- http://marcelponjee.nl/ponjeefiles/file/buxejarig.pdfIn PDF document text
- http://accapierre.it/userfiles/files/99582603010.pdfIn PDF document text
- http://yuanjiangchem.com/upload/files/9771269639.pdfIn PDF document text
- http://victoryelectricalsupply.com/ckfinder/userfiles/files/48652157267.pdfIn PDF document text
- http://maslag.eu/userfiles/file/82002735507.pdfIn PDF document text
- http://futimisdev.com/userfiles/file/xedesijogug.pdfIn PDF document text
- http://kfnmdg.com/upfolder/e/files/20210902112638.pdfIn PDF document text
- http://khangvietdn.com/uploads/file/40983938245.pdfIn PDF document text
- http://studiobaldizzone.com/userfiles/files/54418460709.pdfIn PDF document text
- http://worldsocialistpartyindia.org/ckfinder/userfiles/files/jazewis.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_off0000f901.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF901	19084 bytes
SHA-256: `530080ae913d48fc174379972efff242d0a6e278931fa2a66c2f0eda76c4bcc1`
`font_01_sfnt_off00012a39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A39	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014250.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14250	10880 bytes
SHA-256: `447e5ddc7b7c156c8da281a9ad6dd95270a082b70e2052c2b11506a9cc3eebb2`

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