PDF malware analysis — malicious · 663e3489fcbf03c6

MALICIOUS

PDF

95.3 KB Created: 2021-07-03 21:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 77aec69427e7f3a46e1ef790cc1ba055 SHA-1: a64bc157c7a8dffaebf0e4095cdafd70feabc469 SHA-256: 663e3489fcbf03c67f0e7afd3dd9c924634d7dc291045f2b138958a7bbfc5c2f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The presence of these links suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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
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.
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 http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/52163935848.pdf In PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b543b3e01e0---40701436467.pdfIn PDF document text
- https://itracmediav5.com/ckfinder/userfiles/files/7193399593.pdfIn PDF document text
- https://limsurdua.com/contents//files/nitariririzetowo.pdfIn PDF document text
- https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/6af814ee39f842ad5d55e06c21b49373/jadevi.pdfIn PDF document text
- http://magyaringatlanadatbazis.hu/dev/_user/file/85449900806.pdfIn PDF document text
- http://vicorsupply.com/uploads/images//files/pidugiboxodesegug.pdfIn PDF document text
- https://muzeumkonstancina.pl/attachments/file/jewid.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55c167669e---zuveme.pdfIn PDF document text
- http://orgue-chantepie.info/FCKeditor/upload/file/45403148084.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160964b524f6e2---debijewigabinux.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/78152956241.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608608472c2e3---61115266378.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a41c6f011ba---buvopusov.pdfIn PDF document text
- http://kcde.kr/userfiles/file/68113173725.pdfIn PDF document text
- https://radmangroup-ye.com/rgfiles/file/48908828351.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609487864d308---4453307906.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/s5cspcvjugeoi1a6o3g9oekbh3/62663958907.pdfIn PDF document text
- http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/vuvalakere.pdfIn PDF document text
- http://euro-ex.net/images/blog//file/40840784160.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160740dbde6efc---morazuporifetut.pdfIn PDF document text
- https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071f66e1d1de---46420921518.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689d0e3ac2---tofewubamoditutibe.pdfIn PDF document text
- http://kinel-hunter.ru/upfiles/file/jelaponor.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/mazixegaw.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f113ac2269---56438733611.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=brightheart+and+cloudtailPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f7c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7C3	19720 bytes
SHA-256: `f1322bb4f48a4e6a45fbb1533e26b016fca970c1a9f62470ac4e9636ff540300`
`font_01_sfnt_off00012941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12941	10636 bytes
SHA-256: `f70e6257302e31bebca2603e367bb32cfddd240dfcc824c851c0086cbf601786`
`font_02_sfnt_off0001414e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1414E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001595f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1595F	16236 bytes
SHA-256: `34713e05be2bdbb357be259c69ab4dfbf5b201d0d1a9b93aa810588731fab9a6`

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