PDF malware analysis — malicious · a086938835abe4c0

MALICIOUS

PDF

86.1 KB Created: 2021-07-07 23:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 39cffcdf7ec2d39492395d0b2b5fab84 SHA-1: 68bbc1eaaa815e55cc640f61f5fdcca355eea72e SHA-256: a086938835abe4c0de7fd2f0a1cd62ae2b754938fd3526c389da1d06fbca9ca3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the structure itself is designed to lure users to external, potentially harmful, content.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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
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 https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/a20651bb19a393c13358a65008cb292a/52453739611.pdf In PDF document text
- http://agcslohian.com/userfiles/file/95197940620.pdfIn PDF document text
- https://ises.ca/phpsites/vertical_living/uploads/file/90460380257.pdfIn PDF document text
- https://sheenabusesandcoaches.com/userfiles/file/xuwogoweselov.pdfIn PDF document text
- https://mumegram.com/userfiles/file/zaziwojewivevapit.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/682ff251fb89fb08751a1cbd1a221596/gezeveletopisosi.pdfIn PDF document text
- http://hnc2.com/userfiles/file/gorajipujojo.pdfIn PDF document text
- https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/3442e6805b68819944e154d3672c9f1b/65133230484.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/87ca7e7455e6e55186874a313f5c2099/28253583423.pdfIn PDF document text
- https://olgunbey.com/upload/ckfinder/files/72657982655.pdfIn PDF document text
- http://videofilm-tv.ru/content/File/22936143.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/4bd65b507a7e2af63a9efd22f9e9697e/25898667103.pdfIn PDF document text
- https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/af3a2710b7fcbf50fd98956caae2ba82/56701018006.pdfIn PDF document text
- https://cicadit.ro/UserFiles/file/ratuzu.pdfIn PDF document text
- http://chieusangducphat.com/uploads/userfiles/file/43008094475.pdfIn PDF document text
- http://dolphinegypt.net/userfiles/file/tukapedizakux.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/8ef47e071fc20966473e338726cfd4df/butirivonipuxamokujezemed.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c57794041b---24443506568.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b04723c6f2464aa404faf78f80b8359b/begudenugafofedufifa.pdfIn PDF document text
- http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/supepinofuxete.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3661ec34d3---kazebubusebidara.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/84osltc6dmku5qbjumi7j6pui4/saxamuvusukerizemes.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/1d6fa491b49a6ab923dbf2c0f3d78462/nijumufowapun.pdfIn PDF document text
- http://tuderprogettazione.it/userfiles/files/xugimozemejokadilot.pdfIn PDF document text
- https://gbagencement.fr/uploads/file/forufiretabetoxoz.pdfIn PDF document text
- http://podhoru.cz/userfiles/file/wopalebe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+cif+termsPDF 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_off0000e502.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE502	17704 bytes
SHA-256: `7bf1a28c81566c5458618d007bbf135da96a631974d0d1e483940dfa405e428b`
`font_01_sfnt_off0001132f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1132F	1696 bytes
SHA-256: `28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae`
`font_02_sfnt_off00011b40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B40	10324 bytes
SHA-256: `86adf55018e28ed2a943084b6f163eecbc631528d345f85b36ea8ffc086e1858`
`font_03_sfnt_off00013293.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13293	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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