PDF malware analysis — malicious · a08c54d12704e764

MALICIOUS

PDF

85.6 KB Created: 2021-07-13 11:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: dd1fb1516a455acb379e86ecda8efdf0 SHA-1: ab6dd2774256c6d272f706afb6be44e042e98733 SHA-256: a08c54d12704e76428fc28ebf2b9dce5c7e0d78c951d1b76e6a3b3a0858cd808

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan indicate a high likelihood of malicious intent, possibly involving phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://garglob.ru/uplcv?utm_term=singular+and+plural+for+class+4 PDF link annotation
- https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/80415afe29f6b90dfd3ec330fe0da596/vepafodedivotufe.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/15377747020e5f141bc7ddd88bf2324c/mezewizufibu.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f2a7fb4be58a2899afb03e628ad16580/werimutisib.pdfIn PDF document text
- https://uniontend.com/userfiles/files/riviwebig.pdfIn PDF document text
- http://harryreichert.de/uploaded_pics/News/file/32862018770.pdfIn PDF document text
- http://aelma.com/sites/default/userfiles/file/lozivofajoli.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/jufitivexotawazevuka.pdfIn PDF document text
- http://www.gc-antey.ru/ckfinder/userfiles/files/wazofazi.pdfIn PDF document text
- https://tahubunting1.com/contents//files/27495118055.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d66eed37c2---16602747897.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607640aa2204d---senigowutonugi.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/50258622786.pdfIn PDF document text
- http://baigeleather.com/userfiles/file/14589090717.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d3d1eb4d6452a0a1546e18084d43d22b/38869286415.pdfIn PDF document text
- http://alpanelektrik.com/depo/sayfaresim/file/kulige.pdfIn PDF document text
- http://mobilesamara.com/img/files/file/wobunovasuzelamunawe.pdfIn PDF document text
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607714fe6560c---vogafirurupatekenurapofir.pdfIn PDF document text
- http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d87a9bf6be---49437628078.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607059b04ec9d---refokepusomepapoliladofij.pdfIn PDF document text
- https://stratasphere.online/userfiles/file/11980767109.pdfIn PDF document text
- http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/noxokofosasumitatazisub.pdfIn PDF document text
- http://espacioschillout.es/images/admin/file/86628468025.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/82b40ef0e0b6eb04ebcb95a847c0a78b/95508014254.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/65775459931.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2ea8d0e7620158222448f180c5e60a18/64051435208.pdfIn PDF document text
- http://cephedanismani.com/images/pages/file/8232241665.pdfIn PDF document text
- 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_off0000ec9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC9E	16784 bytes
SHA-256: `6ca414c93849797fcedd02eea52e5d7d51ccadcb35082d840aae29c2303f4258`
`font_01_sfnt_off0001183f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1183F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013056.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13056	10816 bytes
SHA-256: `6863bc90712acd5342fa491e7acc3d738b84e28010ae23ee8375b01685902c07`

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