PDF malware analysis — malicious · 80edf79797aaae22

MALICIOUS

PDF

74.7 KB Created: 2021-09-11 21:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: a8a4b56730c68fa85227e2794e0322f1 SHA-1: 4c89513807e31c4a716f7875c80a01f7e7ea2820 SHA-256: 80edf79797aaae223b156b2a61faa68421fdc6edc89066946203b0f33031f58a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the link farm and the ML classification strongly indicate a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/22694474125.pdf In PDF document text
- https://coherence.cz/userfiles/file/lojomo.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/bobumemixekonenowizajixi.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/waditeru.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc4058277c.pdfIn PDF document text
- https://komunalno-vrgorac.hr/files/bipovajobavadevevu.pdfIn PDF document text
- http://batterseataxi.com/survey/userfiles/files/sezuwelazisudixeruwamesof.pdfIn PDF document text
- https://valenciamaids.com/userfiles/files/51556444181.pdfIn PDF document text
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a0b092b34e87be8378d94e46ef85cc5c/malivole.pdfIn PDF document text
- http://fatimaartwork.com/userfiles/file/98964028129.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d3463c73e---sawixepakalogesivu.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134406153d5e---37400488575.pdfIn PDF document text
- https://synersys.fr/contenu/file/geboregutuwaporafu.pdfIn PDF document text
- https://grandhotelbulgaria.com/userfiles/file/11776503771.pdfIn PDF document text
- http://agroanaliz.by/upload/editor/files/zikubavajilawidoz.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/126f61b7e933389e8b522c63453885ae/49776982959.pdfIn PDF document text
- http://maciejabramowicz.pl/upload/files/file/65018044583.pdfIn PDF document text
- http://zulassungsservice4you.de/bilder/file/57084546461.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/zoxibinepunulit.pdfIn PDF document text
- http://about-dogs.ru/upload/file/vosuvirifowazosu.pdfIn PDF document text
- https://mmgrowersg.com/ckfinder/userfiles/files/xuzigol.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e0175ffbde40d53f4bf4458c8d22b367/jefanewurobebodadated.pdfIn PDF document text
- http://tbff-bygg.se/img/files/sukifojoforitop.pdfIn PDF document text
- https://girl0229960192.com/upload/users/files/letipatubipelozokexaxe.pdfIn PDF document text
- https://vidaleve.ind.br/ckfinder/userfiles/files/50781262624.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=tablet+android+dengan+tv+analogPDF 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_off0000c3ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3FF	16308 bytes
SHA-256: `8660559c9fdcd47f0096d763b4cbb11b9fb8e5f7f9b215d8affb0085094546b3`
`font_01_sfnt_off0000ede3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDE3	10424 bytes
SHA-256: `b6f0e1b043f87f6876ce37873946c72ce39e18512494e55442ee5e5a6f364952`
`font_02_sfnt_off0001056a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1056A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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