PDF malware analysis — malicious · 6b5d17e1aff65fd4

MALICIOUS

PDF

90.3 KB Created: 2021-08-03 13:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 813de60e4694c11a396f09b3e47842d2 SHA-1: 47ca27d2ae30bd3fc249b1f83b37a36551a50390 SHA-256: 6b5d17e1aff65fd4a087ebb5d1885084fdec88b1773bc65f890bbc6b31c5ed2c

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm for phishing or malware distribution. The 'SE_CLICKFIX' heuristic suggests the document may also attempt to trick users into executing commands directly. ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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://hanasushimenifee.com/uploads/files/kojonevaparafunajasi.pdf In PDF document text
- https://arichaindia.com/userfiles/file/28127783031.pdfIn PDF document text
- http://halaljones.com/uploads/files/42321771441.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac724040f84---woxebopikogawuxo.pdfIn PDF document text
- https://0900107678.com/upload/file/davifikubodim.pdfIn PDF document text
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/8u7mrib0k1a6koj5bfncoffep1/34540339232.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/72208601568.pdfIn PDF document text
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/bpkmfh0bs45ghejfq5o814am45/71211129273.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812138d662f---kanud.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086126869750---89543276981.pdfIn PDF document text
- https://primer-spb.ru/files/files/venaviwefowubu.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/29488c72e61f09e1dcd17b333b7a732e/72632966922.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c900a1fd26---17048244591.pdfIn PDF document text
- https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/d167fa597a2844a2aa026fec736cfb88/5309408409.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160835f9cdce41---95009054765.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/99pn530m3vr4dc0qpbeo8d1171/keletuwik.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e95b51f27---33493586886.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6613778346---fexatulawilivexov.pdfIn PDF document text
- https://www.tunnel.de/files/uploaded/file/6028294839.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e216730223---39904760564.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/206ea37ce87a786cdf0a91b503151a05/ruxom.pdfIn PDF document text
- https://africanresearchcenter.com/userfiles/file/pexosepigegem.pdfIn PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/bsaoicf4uejbmfsai27fqj8h5h/94351369481.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e582e03986---31623073673.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+set+different+backgrounds+on+multiple+monitors+windows+7PDF 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_off0000f91b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF91B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011132.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11132	11420 bytes
SHA-256: `793255258f6465dbaf827a6fa48341b03c1f7d1a1c2fd47d79c4dbadb9783b4a`
`font_02_sfnt_off00012bcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BCC	17360 bytes
SHA-256: `7c0c80b792a8fcf83a2ba00fe4c6de6a8cea3645fdbca32ca402aacc4e4247a1`

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