PDF malware analysis — malicious · cf63ff31aeb934d9

MALICIOUS

PDF

82.8 KB Created: 2021-09-22 12:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 93d9517cfe7dee4b74b3f7818ddbbaea SHA-1: 5ec6846f390f8704bedafa4090ef7d4a3f68fdb3 SHA-256: cf63ff31aeb934d98d912d09515ae220f80afd075a557596136c8060c69eef65

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior, suggesting the document is a link farm designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://allytemp.ru/uplcv?utm_term=kamasutra+book+english+translation+pdf PDF link annotation
- http://associatedreclaimed.reclaimedoils.com/userfiles/files/rogaladexiberuwod.pdfIn PDF document text
- http://mosme.org/uploadfile/files/16095292342.pdfIn PDF document text
- https://trieurodata.ro/images/file/19878889481.pdfIn PDF document text
- http://pandoraecza.com/genelresimler/file/kuvunikarazivaxag.pdfIn PDF document text
- http://qkmedica.com/uploads/userfiles/file/renugutixogu.pdfIn PDF document text
- https://vettercycles.ch/userfiles/files/94992831027.pdfIn PDF document text
- http://dogwarts.ru/sites/default/files/file/maferixotexolobonuledove.pdfIn PDF document text
- https://okud-istra.hr/userfiles/file/13320289436.pdfIn PDF document text
- https://vibangnhadat.com/uploads/files/15310391168.pdfIn PDF document text
- https://newegys.egyseg.eu/ckfinder/userfiles/files/71173018308.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/31370395310.pdfIn PDF document text
- http://coeb.eu/userfiles/files/memirog.pdfIn PDF document text
- http://factblogs.com/uploaded_files/userfiles/files/21179629711.pdfIn PDF document text
- http://imdmotors.com/uploadfile/file/2021091205494059.pdfIn PDF document text
- https://simon-daulte.com/ckfinder/userfiles/files/towuvubexopilipivaropixi.pdfIn PDF document text
- http://kiuruvedenlukio.fi/tiedostot/file/nesevavomatizofuvivilo.pdfIn PDF document text
- http://themadthinker.com/temp/vinney/HTML/userfiles/file/9448544397.pdfIn PDF document text
- https://datajournonepal.org/files/gimagufadogubojagazodaj.pdfIn PDF document text
- https://gullyracing.it/admin/ckfinder/userfiles/files/1355868860.pdfIn PDF document text
- http://aloisiquadri.it/userfiles/files/29151099833.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614047bd9f24d---tuxikozenezaxubix.pdfIn PDF document text
- https://menu2uplus.com/images/file/16653889999.pdfIn PDF document text
- http://dailythang.com/userfiles/files/31300257792.pdfIn PDF document text
- https://pracowniatechart.pl/fckpliki/file/66238109807.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_off0000dde0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDE0	11268 bytes
SHA-256: `437b28e004b74b51ebed97793ad9097ff87f696a51e9df65eedf6e07389ed3ef`
`font_01_sfnt_off0000f7a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7A9	17772 bytes
SHA-256: `7489604b234ad5ed00869170a4d3fb8d6714abbf3d103b4a92328bc21971561d`
`font_02_sfnt_off00012578.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12578	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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