PDF malware analysis — malicious · ce0995be360665d6

MALICIOUS

PDF

68.7 KB Created: 2021-09-20 15:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 89eff140df702aa97afafca3c9691966 SHA-1: e72c23b765dfede282daed1d8bf7d980ef0ddf5e SHA-256: ce0995be360665d665d74632f0241cd87121caeaf8ad0398502256381719f064

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or malware distribution PDF. It contains embedded JavaScript and a link farm pointing to various unknown and potentially compromised domains, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript indicates a potential for further exploitation or payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://aaaxxion.info/images/file/93349042876.pdf In PDF document text
- http://langmoon.jp/js/upload/files/gagotigajajunijura.pdfIn PDF document text
- https://vaitinhdien.com/app/webroot/upload/files/mowovowitisumamuriz.pdfIn PDF document text
- http://gmart-express.com/demo/uploadpic/file/46092531783.pdfIn PDF document text
- https://chandrakantmusicacademy.org/ckfinder/userfiles/files/jafavowifuzotupafex.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135743889d8f---wevuxedijalo.pdfIn PDF document text
- http://vo23.ru/upload/file/70033576617.pdfIn PDF document text
- http://jiji.pgo.tw/pic/uploads/files/rinatoj.pdfIn PDF document text
- https://tideandtigers.com/ckfinder/userfiles/files/27507732664.pdfIn PDF document text
- http://tcihk.com/userfiles/64354856429.pdfIn PDF document text
- http://wingtsunkungfu.ro/imagini_ws/volurobaloxutotebe.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9307d4c3de246769b3c6cc96b98b6bc9/xobuwokisapiwol.pdfIn PDF document text
- http://konferencii.org/web/uploads/assets/file/40749744582.pdfIn PDF document text
- http://veiligheidsslot.nl/ckfinder/userfiles/files/14740831827.pdfIn PDF document text
- https://duel.pl/userfiles/file/kijilajewadanitagaxuz.pdfIn PDF document text
- https://dolnoslaskialarmsmogowy.pl/imgturysta/files/98642093797.pdfIn PDF document text
- https://fleschimmo.lu/userfiles/files/sunifozategebexobomi.pdfIn PDF document text
- https://icnj.net/ckeditor/ckfinder/userfiles/files/zefenuled.pdfIn PDF document text
- http://fuzoku-kyujin.jp/ckfinder/userfiles/files/nevagevixasurasuwuduzup.pdfIn PDF document text
- https://huanghecables.com/d/files/22098783620.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/e3a1dbcfae6d5230d9f4946dc6455e60/ratudujajepixekotadovef.pdfIn PDF document text
- https://artlabjo.com/userfiles/file/xobunutazowopedezajidiki.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afff6ecf83---37903973066.pdfIn PDF document text
- http://sreema.org/FCKeditor/file/41041993533.pdfIn PDF document text
- https://mobilaide.com/upload/editor/file/fowamigilola.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ringtone+banane+walePDF 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_off0000b1ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c9bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9BD	14472 bytes
SHA-256: `0e5eca71f8c980a48df403d52440a30655c1fce9ef977c49c9bdb2e670f1f330`
`font_02_sfnt_off0000ee37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE37	10284 bytes
SHA-256: `b62d143096851e5840b77baf2062ee3c72b6b81dd683ec83e27714bd76500d4a`

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