PDF malware analysis — malicious · 13cdd02c77eac19b

MALICIOUS

PDF

88.6 KB Created: 2021-09-12 05:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 81645dd53f53a5da2f1be47926313893 SHA-1: b77a32f30b3a09910d029e7f7efb368373f987fa SHA-256: 13cdd02c77eac19b9865d6d7ce3d8bb2592ee7ce742a408961cbfc011303c768

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting and appear to be part of a link farm. The primary function seems to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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.
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=putlocker+the+courier PDF link annotation
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb51389a1---81917042933.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ofvvmu69d0gbj8pu9fhqd46rv4/numozal.pdfIn PDF document text
- http://kraemer-duennebacke.de/files/file/38351127446.pdfIn PDF document text
- https://jpt.mysmartedu.com/uploadimages/files/samonuxodiw.pdfIn PDF document text
- http://ardeche.proximeo.com/ckfinder/userfiles/files/62051718050.pdfIn PDF document text
- https://nazrabilisim.com/calisma2/files/uploads/sibepawezezalular.pdfIn PDF document text
- http://videofilm-tv.ru/content/File/16981960550.pdfIn PDF document text
- http://theartofdesign.nl/ckfinder/userfiles/files/kiwilokuxi.pdfIn PDF document text
- http://kerekagy.hu/UserFiles/file/85398012136.pdfIn PDF document text
- https://bonaparte.cappencms.com/templates/files/74365003125.pdfIn PDF document text
- http://janaturismointegrato.com/uploads/file/zamidiloxitipanilepaz.pdfIn PDF document text
- http://kdsonline.org/userfiles/file/kamodavonijide.pdfIn PDF document text
- https://loppisidjupdalen.se/images/uploaded/file/safofoni.pdfIn PDF document text
- http://ncdesign.it/userfiles/files/67022340139.pdfIn PDF document text
- https://livres-arts.com/ckfinder/userfiles/files/52400859566.pdfIn PDF document text
- http://gk-eventus.ru/admin/ckfinder/userfiles/files/60083585954.pdfIn PDF document text
- http://www.dgtrans.co.th/login/ckfinder/userfiles/files/38875010961.pdfIn PDF document text
- http://stavclearing.ru/upload/files/55581332105.pdfIn PDF document text
- http://garage-ys.info/js/upload/files/77045201116.pdfIn PDF document text
- http://korvet-sp.ru/userfiles/file/nelilumid.pdfIn PDF document text
- http://rockbond-aac.com/id-admin/fckImages/file/zodevulakudizemarapexupu.pdfIn PDF document text
- http://www.jasolasia.com/image/upload/File/xadevirapasipavego.pdfIn PDF document text
- https://dcimx.com/files/kivuj.pdfIn PDF document text
- http://droprint.my/home/ququ4923/public_html/userfiles/file/51203488425.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_off0000f165.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF165	20108 bytes
SHA-256: `c3af7acbf770a49f555d5b83e4bb1689719423610a52b56a851ab6061c5fc8bf`
`font_01_sfnt_off00012656.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12656	10084 bytes
SHA-256: `5026e721b1a7bab2838a6be9b36ef260a03f21a11eaf4010d5bc415df1fea395`
`font_02_sfnt_off00013cf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13CF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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