PDF malware analysis — malicious · 469db987a9a80f7a

MALICIOUS

PDF

79.6 KB Created: 2021-10-10 22:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 0cbba195a8c257c6bf5a96ff99b6a362 SHA-1: 40181700b63c0ad8366d65e07d7834d31bb9ff93 SHA-256: 469db987a9a80f7afcf605021e7fcbe2449ea20e9411d66acebe777583a491fc

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous embedded links, many of which point to compromised websites or disposable hosting, and are disguised as software download pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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=office+2010+activator+free+download PDF link annotation
- https://autopsrus.com/ckfinder/userfiles/files/sajezejegaguberox.pdfIn PDF document text
- http://outspokenholland.com/userfiles/fckFile/20210909232856.pdfIn PDF document text
- http://biplano.eu/userfiles/files/38100292830.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313b2566575---97720777000.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ik1fsbdp7bi60nkl0otpgs98aa/lagetufokubu.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/094999cfe32d688ad97e7e51e51ae5ea/64291528042.pdfIn PDF document text
- https://wiltech-hk.com/editor_upload/file/loror.pdfIn PDF document text
- https://bursakaynak.com/userfiles/file/rerirerewaritenanira.pdfIn PDF document text
- http://bionazorat.uznature.uz/userfiles/file/11054078311.pdfIn PDF document text
- http://chia4kids.ru/ckfinder/userfiles/files/vixoruwepobow.pdfIn PDF document text
- http://bukhatirhomes.com/userfiles/file/76771202284.pdfIn PDF document text
- http://pol2-simf.ru/userfiles/file/wumopavedizuxibeno.pdfIn PDF document text
- http://musthighschool.mn/ckfinder/userfiles/files/33446576546.pdfIn PDF document text
- https://egca.fr/userfiles/file/peroganifunijikew.pdfIn PDF document text
- http://fsf-vastroad.com/userfiles/file/radejesonekir.pdfIn PDF document text
- http://wildzipper.com/clients/wildzipper/userfiles/file/6487962449.pdfIn PDF document text
- https://bititechnika.com/uploads/file/98000577088.pdfIn PDF document text
- http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/83029174802.pdfIn PDF document text
- http://artwatch.ru/userfiles/file/3508871683.pdfIn PDF document text
- http://dinhvi5s.com/images/newtech/files/suzizi.pdfIn PDF document text
- https://muratay.nl/userfiles/file/79217163263.pdfIn PDF document text
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/3srkenotum6q6vvlj2qi31r4k2/7547350394.pdfIn PDF document text
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/cc2b5c32beb757b2a5f92d33468bcca9/61160475909.pdfIn PDF document text
- https://www.iieng.org/editor/ckfinder/userfiles/files/gobosa.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_off0000d3a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3A9	16840 bytes
SHA-256: `a3a05c6f98f711ef03088c345952d2e52f2e7ca79d84237bcd6d36a0258053df`
`font_01_sfnt_off0000ff88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF88	10772 bytes
SHA-256: `f934afc5571a7e6126c3f33ab9201e168a340e8e4030c7426288941a031dc5b1`
`font_02_sfnt_off00011898.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11898	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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