PDF malware analysis — malicious · 6a2fb47e01ab7255

MALICIOUS

PDF

79.2 KB Created: 2021-09-17 19:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: de1d6fd944e7fb8ef0d0896641d68680 SHA-1: b2f4688ac0adc25930c893013ae6a6252c6e8a99 SHA-256: 6a2fb47e01ab725520649ff190c7eb657cffadc25e8edc8e53a3be18bb8224c0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URIs indicate a likely spearphishing attachment used to drive traffic to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://huntic.ru/uplcv?utm_term=android+browser+inspect+element PDF link annotation
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ff4bb318739a3d43813492763aedd43d/52745863477.pdfIn PDF document text
- http://werkkledingverkoop.nl/images/docman/files/99373905829.pdfIn PDF document text
- https://doxity.ro/ckfinder/userfiles/files/53277782306.pdfIn PDF document text
- http://anabakorea.jp/userfiles/file/60920925239.pdfIn PDF document text
- http://sherwoodonionfestival.com/ckfinder/userfiles/files/keloguragimuradafevoluz.pdfIn PDF document text
- http://www.zywawiara.pl/pliki/65073107987.pdfIn PDF document text
- http://pluimveebeurs.com/userfiles/file/refuvafat.pdfIn PDF document text
- https://atlantidegattico.it/file/fafizagupagomagi.pdfIn PDF document text
- https://ottopianos.nl/files/59410867885.pdfIn PDF document text
- http://codienlanhminhquang.com/upload/files/62278453000.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/71ae18ed05977e558a501d1d7d54fb93/58642052012.pdfIn PDF document text
- https://bawaniint.com/ckfinder/userfiles/files/30932049247.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b7987dd8e---8360073211.pdfIn PDF document text
- http://zatexpress.com/upload/userfiles/files/dosesivupusotidunodirib.pdfIn PDF document text
- https://mariellatriolo.it/public/file/zokesiwobopukozobodoso.pdfIn PDF document text
- https://autoandtruckrepair.net/nbloom/fckuploads/file/31581356457.pdfIn PDF document text
- http://viquadro.com/userfiles/files/43825688108.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9eb1d80c3---3088576168.pdfIn PDF document text
- https://airxps.com/userfiles/files/nalise.pdfIn PDF document text
- https://kalimati.in/userfiles/file/66441095652.pdfIn PDF document text
- http://www.xzass.org/ckfinder/userfiles/files/dakisetarutaforusaxat.pdfIn PDF document text
- http://uktohabbarijamalta.com/files/file/menelodewasofamuxasubaza.pdfIn PDF document text
- http://msmzizkov.cz/data/dokumenty/kuturukukano.pdfIn PDF document text
- http://polkovnik.su/upload/file/pokemisusovapizovari.pdfIn PDF document text
- http://artetendasud.it/userfiles/files/35461045462.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_off0000d140.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD140	10720 bytes
SHA-256: `808f04649c8d4918221dff92eef11a107311e5f452cb138a72ffba2a9908cce4`
`font_01_sfnt_off0000e9ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9AC	17672 bytes
SHA-256: `be7f5ef84b3621a20160419f348889cda1e15193696616b3e11083bd25380c0e`
`font_02_sfnt_off00011728.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11728	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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