PDF malware analysis — malicious · e801dfdf4126b22a

MALICIOUS

PDF

77.6 KB Created: 2021-08-13 21:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 7a324226633c75c143765029bfeecf14 SHA-1: b126d42c6e683cf958691e9b504f28a41a9bd600 SHA-256: e801dfdf4126b22afefe632171b393fb0be0a81837aaf9571f3f6d174c6fe0e8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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://philabc.ru/uplcv?utm_term=figurative+language+quiz+pdf+with+answers PDF link annotation
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610ffd8911603---93793942566.pdfIn PDF document text
- https://ocbond.org/userfiles/files/zijeb.pdfIn PDF document text
- http://humanitool.ru/userfiles/file/woxitunonimaguragoboxuxof.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2501a4fa89b8f25f573ab9590e93a2da/15317329617.pdfIn PDF document text
- https://cochleartudaskozpont.hufiles/kuveworizawove.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9be5f588---65935997700.pdfIn PDF document text
- https://abicecream.ru/ckfinder/userfiles/files/rimelemuxew.pdfIn PDF document text
- http://ckrestaurantgroup.com/ckfinder/userfiles/files/20747225340.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082342996d01---namor.pdfIn PDF document text
- https://ppuhperspektywa.pl/files/edytor/file/50092201783.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/zozefegelolenerotelor.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882e5bf293---zifamerisomifelifabo.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/giluwuta.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/14e75p2e96267nh4hqk2npur25/62889605041.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/904466c57a0415549e123eddd1085a1e/2285972474.pdfIn PDF document text
- https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/68c39e3ee4f865d1d3caef44ba48a063/84351214637.pdfIn PDF document text
- http://boxethai38.com/upload/file/kepivubezoroneragum.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed85282463---7074807218.pdfIn PDF document text
- http://ekolojikweb.net/upld/userfiles/file/vulelizataxomopixeguziva.pdfIn PDF document text
- https://ewastexperts.com/userfiles/files/wetup.pdfIn PDF document text
- http://studiopassarotti.it/userfiles/files/merajojutuke.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16096bc1aead55---28958609644.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/24031d9171b786c0c5a5bca7d633602b/31153185035.pdfIn PDF document text
- https://businesslife.com/content/file/tebejajatimi.pdfIn PDF document text
- https://vicotelecom.vn/static/source/images/file/tiwunas.pdfIn PDF document text
- http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/jigulomelijapika.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_off0000ca4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e260.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE260	16932 bytes
SHA-256: `ae2940473f1a729c24ffe94c370818e1e033d240f9b97dabe104c402dcedc694`
`font_02_sfnt_off00010e5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E5E	11092 bytes
SHA-256: `c0a18dde86720155da570a8b6f9b4e2bc95294393812945d112b1a6be7316b37`

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