PDF malware analysis — malicious · 3c1d3db3e0ad33f9

MALICIOUS

PDF

90.4 KB Created: 2021-09-27 09:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: a32d8e9d5bd03485f668c0cf55602624 SHA-1: 0a6ea706c59c240277b70155b3c1d8b0aa614e9e SHA-256: 3c1d3db3e0ad33f9d869f5ddf1ed3e0deaddd13569be9112ab76a49c97298ce0

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, including one pointing to 'allytemp.ru' with a query parameter suggesting a lure related to cheat codes. The PDF also exhibits characteristics of a link farm on disposable hosting, indicating a probable phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://allytemp.ru/uplcv?utm_term=pokemon+fire+red+cheat+codebreaker PDF link annotation
- http://studioarchterreni.it/userfiles/files/94007562922.pdfIn PDF document text
- https://interangkorcondominium.com/userfiles/file/69429917578.pdfIn PDF document text
- http://vonschickenconcord.com/uploads/files/rurojofilobux.pdfIn PDF document text
- http://transporteslaplata.com/imagenes_web/file/86592117826.pdfIn PDF document text
- http://castrolmintabolt.hu/images/upload/file/dutolununenamani.pdfIn PDF document text
- https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/laped.pdfIn PDF document text
- http://cherriestattoo.com/ckfinder/userfiles/files/kulurugoxivemuzo.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6c325ff56---redadedof.pdfIn PDF document text
- http://octapus.vn/images/uploads/files/wunudasukuruzojotakilel.pdfIn PDF document text
- http://geoodwierty.pl/files/file/befoloven.pdfIn PDF document text
- https://newsru.md/upload/userfiles/files/6617098127.pdfIn PDF document text
- http://gibisch.info/files/files/64168644029.pdfIn PDF document text
- http://humanitool.ru/userfiles/file/lavojameradov.pdfIn PDF document text
- http://iscelenie.info/files/file/nalidabesesejuxugo.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/newasami.pdfIn PDF document text
- http://ameshamagazine.com/js/upload/files/57029762816.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a5f58556b---xofasedimakeneselirite.pdfIn PDF document text
- https://nusbetaja2.com/contents/files/71915010481.pdfIn PDF document text
- https://ap-qatar.com/userfiles/files/6577844895.pdfIn PDF document text
- https://gameclub.by/uploads/files/mufuzikilatulebovevadekes.pdfIn PDF document text
- http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/lebapunoweruje.pdfIn PDF document text
- http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/mawig.pdfIn PDF document text
- http://www.look4job.gr/images/_user_na/file/29316342152.pdfIn PDF document text
- http://clair-environnement.eu/catalogue_dynamique/file/14779194387.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_off0000f819.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF819	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011030.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11030	10760 bytes
SHA-256: `7612215be3bfe364d5292819b26bf4d4c572822ef89f6f52d9a4626170707164`
`font_02_sfnt_off000128b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128B7	19944 bytes
SHA-256: `886a397f61c17e4cbc5acc70054928e4f7b87f150cedf1f97dbbe8ffdbd8c88a`

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