PDF malware analysis — malicious · 678e866d466ef0b0

MALICIOUS

PDF

74.7 KB Created: 2021-09-01 10:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 1012cccff04c7a3d91897f4e2ed40828 SHA-1: 369215aa3bf24d123da5d7bb2e6ddd4bc268d2e5 SHA-256: 678e866d466ef0b00fa776e2c8201e88e194a26d8eb05626a293e24fa75ee815

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of link farm heuristics and compromised CMS upload links suggests a tactic to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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.
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://iwistw.com/upload/files/zusiwipedaxatovufutexize.pdf In PDF document text
- https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0daf11ac54ba0f57c55f809a40238a17/50337826933.pdfIn PDF document text
- https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/51unrmeoo59mrr5dmi8t87kjr3/mimenosowutuzovodowufe.pdfIn PDF document text
- http://bafiti.com/sklep/userfiles/file/35032957126.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/2u6emgjkeid72onqhcktl49rb6/bizekebon.pdfIn PDF document text
- http://autoscuolauniversale.it/userfiles/files/tagumebotamosit.pdfIn PDF document text
- http://hochrainer-elsner.at/upload/files/fibapu.pdfIn PDF document text
- https://actorconseil.com/files/file/95560117852.pdfIn PDF document text
- https://sikanderajam.com/Robinson/ckfinder/userfiles/files/duvimunumo.pdfIn PDF document text
- http://dailycan.com/userfiles/files/zibegekibuxezezebexo.pdfIn PDF document text
- https://zevkotodoseme.com/upload/ckfinder/files/61327178823.pdfIn PDF document text
- http://promocode.lu/userfiles/files/mikotedebejaguvejej.pdfIn PDF document text
- https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/k2g06i4f7hmc771ti02vh4ns0t/35636845838.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd7e68b13---11965427817.pdfIn PDF document text
- https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/81543149898.pdfIn PDF document text
- http://www.asslar.de/downloads/xomulutegizu.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/2d32pggfddcj3ag2lled71f6un/5762795935.pdfIn PDF document text
- https://gloriouz.in/ckfinder/userfiles/files/50598261143.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/9sgn73gnv6ojsth9dqjn7c7lf6/pumavazegetalu.pdfIn PDF document text
- http://jenistudio.com/upload/FCK/file/fivivuxitifufigap.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/uu7c95hsn0dian33hvcrdcj3lp/69559672343.pdfIn PDF document text
- https://b2cexpressdemo.com/userfiles/file/46139214930.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/i104686ua89fsjpqvlhruafpi5/17053121155.pdfIn PDF document text
- http://www.superior-inkjet.com/login/ckfinder/userfiles/files/bufemawijaliwafekexob.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=power+maths+year+4+answersPDF 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_off0000bf16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF16	17268 bytes
SHA-256: `865e115d117ca0ba2559e3bb5f8f41891796248f618be49dceb7cbbee0b8e25c`
`font_01_sfnt_off0000eb2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB2C	10512 bytes
SHA-256: `7c982e10775788bd94880dc9f258054cc009fb9834a2007c9b1efc98d689d542`
`font_02_sfnt_off00010319.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10319	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.