PDF malware analysis — malicious · 32bf7a9f6e96dc97

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 23:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 66d34d9da7c92d9d5d1c7aaabd1cfe9e SHA-1: 06a5283421ab9ed0187a625c8b74e43116641b93 SHA-256: 32bf7a9f6e96dc9725fc216ec2108bc68e27b4e3814b75ed5f4d533409cf42aa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The PDF structure and link farm characteristics are consistent with techniques used to obscure malicious destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fdc10d42757---pezuzovewabutegorevisene.pdf In PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e07442d21102f8a6d3013d486abb30fa/88352812028.pdfIn PDF document text
- http://thaide.org/userfiles/file/84975289215.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/42341ed8d78bdc85c665d69ccb27a8f3/7270767111.pdfIn PDF document text
- http://visit-pune.com/userfiles/file/poweziributob.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e54a51f7c---4631869057.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160870d4e48c29---88644638818.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ae60fe9c2b4efb1dcaa976191e273bae/xalagi.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/23974593786.pdfIn PDF document text
- http://eraucheta.ru/uploads/file/lujesewaxuxuko.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/181ab845c1749c6458b8d50e5aeb53ec/mavaxutoduvinibujumowej.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc21717045e---lesafivo.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5d736e2f6922e57c92eddf23fee3adcd/78700087705.pdfIn PDF document text
- https://adian.eus/files/galeria/files/borubaxuxaweverujos.pdfIn PDF document text
- https://drinkpoint.com/uploads/files/kuweza.pdfIn PDF document text
- https://laserbeautymachine.net/d/files/38825548254.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0975bb02---34389778377.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/65300190397.pdfIn PDF document text
- http://alphanaturehk.com/userfiles/file/54933359195.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a36ef275---53141113802.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fad7c628c---81780565780.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16087711341da1---valusolixabevisasodidej.pdfIn PDF document text
- http://youngthisyear.com/ckfinder/userfiles/files/73435001230.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/44801299256.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e37d67b8694---48855893975.pdfIn PDF document text
- https://marblobaths.ph/app/webroot/img/files/jowit.pdfIn PDF document text
- http://studiotrusso.it/userfiles/files/lafosejolinotevapavexi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+convert+pdf+into+ms+wordPDF 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_off0000d99c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD99C	18872 bytes
SHA-256: `6ffa2a1ee0fc3e1441dff3ce2e61f7145ba5641e270588112bff914a89660daf`
`font_01_sfnt_off000109f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12210	10716 bytes
SHA-256: `6f8ec7bf65c554fe5379d90b1869beb0ff90880e36cee034fbdcf199ceb3b2ae`

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