PDF malware analysis — malicious · 676c8420f0581149

MALICIOUS

PDF

85.0 KB Created: 2021-09-19 09:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e8d3bc0dcb5c983201f5ad5f97155b42 SHA-1: 3b95e8aa797a150b6c5069f3333c88524a127063 SHA-256: 676c8420f058114974c47b1a63d93ed2927e4ab460d8b92b8d80208ada5c6ce0

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of multiple unknown URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 6

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/titupe.pdf In PDF document text
- https://phoenixturkey.com/upload/ckfinder/files/78090691247.pdfIn PDF document text
- http://sladkiy-ostrov.ru/userfiles/files/rifagafukezaxewapatixepal.pdfIn PDF document text
- http://elitakhealing.com/ckfinder/userfiles/files/lerafipijizurim.pdfIn PDF document text
- http://ttmm.co.jp/ckfinder/userfiles/files/30153001564.pdfIn PDF document text
- https://inprovitpuertorico.com/ckfinder/userfiles/files/dagoruwasizig.pdfIn PDF document text
- https://ta-taiwan.com/app/webroot/userfiles/files/zigifuku.pdfIn PDF document text
- https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/ponewiwuduxoparezu.pdfIn PDF document text
- http://debsecond.net/UserFiles/File/31760901854.pdfIn PDF document text
- https://kingyao.com/uploadfiles/files/20210902_192712_5881.pdfIn PDF document text
- https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/73559321762.pdfIn PDF document text
- https://eletmodguru.hu/files/files/rodomipidoton.pdfIn PDF document text
- https://colegiumaniucarei.ro/ckfinder/userfiles/files/18523304537.pdfIn PDF document text
- http://montex.pro/uploads/userfiles/file/28832267238.pdfIn PDF document text
- https://butyfarm.mm520.net/userfiles/files/74782728879.pdfIn PDF document text
- http://goldmustang.ru/files/files/72404844346.pdfIn PDF document text
- https://smobiil.eu/userfiles/files/xevapitevidavepeminozosa.pdfIn PDF document text
- http://kd-council.com/upfile/files/34752427119.pdfIn PDF document text
- https://jancsoalapitvany.hu/ckfinder/userfiles/files/potidaxamedigusuze.pdfIn PDF document text
- https://partroyfuneralhome.com/partroy/assets/file/kobilejeg.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a583973fe---4435823464.pdfIn PDF document text
- https://pierreseche.fr/userfiles/file/natiwawenobawewubaf.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407a8e2a52b---66645545170.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=best+app+for+slow+and+fast+motion+videoPDF link annotation
- 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_off0000e5ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fdbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDBE	18184 bytes
SHA-256: `11e6c9cfc88e840b4636e25b7478a25d021bca9c5968f8dcc7a49948ef189400`
`font_02_sfnt_off00012cdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CDF	10864 bytes
SHA-256: `e525a8e78bac6a4231a087178ba63be5b4ae5cef060c3be20437ab08f47ffda6`

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