PDF malware analysis — malicious · 695c43564ea51039

MALICIOUS

PDF

75.6 KB Created: 2021-09-12 22:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 0691969377ef0363d711f8778cb68c2f SHA-1: 4cbd1db1d6bc5b6dda25c405a289d93ebd53ac86 SHA-256: 695c43564ea51039823d77a62aff2d1a8f4d981dc84d7f5a9584cce079f7e227

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious activity within the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://crysiq.ru/uplcv?utm_term=shareit+apk+free+download+old+version PDF link annotation
- https://snf.styleguides.ch/userfiles/files/nuzujidozidiporiwemi.pdfIn PDF document text
- http://tcsm62.org/uploads/news/file/74625123854.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613aece930b2a---vivate.pdfIn PDF document text
- https://signatureshreyas.in/userfiles/file/17499785536.pdfIn PDF document text
- http://www.fashiongale.ro/userfiles/files/mubamonovu.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367e9f3d3e7---64856981090.pdfIn PDF document text
- http://immobilier-valence-agen.com/userfiles/file/17660472217.pdfIn PDF document text
- https://digireg.sk/upload/27752959658.pdfIn PDF document text
- http://longbienco.com/js/ckfinder/userfiles/files/94429089144.pdfIn PDF document text
- http://autoklej.pl/app/webroot/media/files/dilubunujepivanedima.pdfIn PDF document text
- http://xn--80aa5alfu.kz/file/zixatogodivuvakugubij.pdfIn PDF document text
- https://pmsp-me.com/userfiles/files/2287568156.pdfIn PDF document text
- http://agilesolutions.in/uploads/lujaduwozazivizorawukake.pdfIn PDF document text
- http://bookblog.kr/data/file/files/40425109152.pdfIn PDF document text
- http://langeline.com/ckeditor/upload/files/kafezelamixunezitut.pdfIn PDF document text
- http://ed-union05.ru/files/file/tisemoni.pdfIn PDF document text
- http://qhchemicalsfeed.com/upload/files/tegemosolopu.pdfIn PDF document text
- http://ykzn8.com/upfiles/editor/files/27034084874.pdfIn PDF document text
- https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/81005783604.pdfIn PDF document text
- https://fcr-fomentoconsumoerenda.com/uploads/files/67923313457.pdfIn PDF document text
- http://babijie.com/upload_fck/file/2021-9-10/20210910105511104597.pdfIn PDF document text
- https://marbletreasures.com/uploads/image/files/nagomimofev.pdfIn PDF document text
- https://thefencedocumentary.ca/adminfiles/file/32082118644.pdfIn PDF document text
- http://dulichgiahy.com/upload/file/89713706061.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_off0000c45e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC45E	16524 bytes
SHA-256: `662cd3eff1f024c61eca2fddb494355739ad78ce10cbaf465b88a93fe8e5a27a`
`font_01_sfnt_off0000eefd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEFD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010714.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10714	10912 bytes
SHA-256: `d665afc82442a11c0131867bd603be1fa6c04f6106317f963c47c9f2897980dd`

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