PDF malware analysis — malicious · 86008fbc97f666c9

MALICIOUS

PDF

88.1 KB Created: 2021-06-30 21:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 0e31c3f2dce3b16b076ac280d93e8c41 SHA-1: 7eb2b9b802731f7cb0c45de5223f25231d63a8cd SHA-256: 86008fbc97f666c98d03d8446c3d161605539e1f08c0731b47929cc3baa36c29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and link farms on compromised CMS uploads strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897ae1bf75d---33591180394.pdf In PDF document text
- http://opakowania-loga.pl/zdjecia/fotki/file/tebulanitusuvuw.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/af9s59qm9sn9ise3g4b71kbeu0/25286842943.pdfIn PDF document text
- http://prosquash.by/data/limavedafubawobu.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/isun9qbf8vcq6mvjcetmt0hsqv/nuxazodesi.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd10095cee---18173266851.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c52a6e793---36317240025.pdfIn PDF document text
- https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/b66d3b96437fc45d0f8419085a3fb2ca/80635284320.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081952c466e4---xamuraluwuvesegolalel.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/793b8e417dba654757343a55be6bab96/kesojaraxipezijutujejodij.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ffdfb0201dcdc2d95b04b5a47ddf0274/bukuzuwilelinuge.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4o3ui5huj498nerc1ffm3a11p6/82759320119.pdfIn PDF document text
- https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/enqdii4jhuoumo85hs9g9dkau1/84687764232.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c99fde70a6---72358854018.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/cbadc86f7344238f3711211598eff0fe/46931153782.pdfIn PDF document text
- http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/8423224323.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/5aa3829ece6a2fd8ed8cff9d96398f6a/43691859555.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089935a4fad3---936510125.pdfIn PDF document text
- https://seitonsolutions.com/ci/files/3311796157.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ade49993e03---53346923604.pdfIn PDF document text
- http://aucoindeshalles.com/menu/file/61355827780.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe652af50d---likole.pdfIn PDF document text
- http://learningkey.org/userfiles/dokozoduzilata.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m9ndcophrp98mkt3p78jv0irp3/4713580294.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=incredibles+theme+song+trumpetPDF 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_off0000f52c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF52C	17472 bytes
SHA-256: `e9352d5f3c374f0dfdb157276bf95e7958307f87d7b047d2d9913d9562cf18f7`
`font_01_sfnt_off0001224a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1224A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013a61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A61	10988 bytes
SHA-256: `83117014d43a5c37750007d190e72219b4ad9cfc7c10f0e53405f4457d0cbd26`

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