PDF malware analysis — malicious · b84eaa877314fa0d

MALICIOUS

PDF

89.2 KB Created: 2021-08-11 00:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 2626a9fe52e0fc126f5f210f8a177498 SHA-1: 3c0a8e3dd5b4882553f3b3ac780587c15dd81c19 SHA-256: b84eaa877314fa0deaa30ddf380a1c5a9d6e2f7ea33e1ed91760abdbe095e198

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

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://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607522dfa064e---xoxegelimefidetumuladepuz.pdf In PDF document text
- http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/42071256769.pdfIn PDF document text
- https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/g4pcir9m8cdsqind4ni0r21ng2/ruwotavofomukuva.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16105a23de64ba---sizibugajikojodobuxi.pdfIn PDF document text
- http://thietbianninh188.com/uploads/files/wadilediwurekobikan.pdfIn PDF document text
- https://lyubomiradineva.com/files/file/35366691467.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/7prvq6mniieg4oh5491ios6gb5/7295648976.pdfIn PDF document text
- http://zap-interactive.com/uploads/files/setulizixani.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e0ac2707b---19542701297.pdfIn PDF document text
- http://asfus.net/virgsurv/userfiles/file/busurolekefozenop.pdfIn PDF document text
- http://ruihuitax.com/files/file/66718458551.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49ead0e8c---25478648005.pdfIn PDF document text
- http://nacyc.jp/Upload/file/sofima.pdfIn PDF document text
- http://stpatricksreunion.com/clients/84553/File/89159060601.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7286a253c4---87716399904.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/v6cati50uf56u1n3ndg2vajc1q/zubidajinikusil.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/7balsih9tapgdr46r5eh0mv69v/gupifujuwakiguxejizisitek.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d98aa3a308---kodoxujoxeguka.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b189bfb03---nukositigufu.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160723cb670fd7---77780197509.pdfIn PDF document text
- https://viettrungson.com/media//Files/63916032626.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077a2077d5bc---75646992648.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/tjijibohpv9ve03qbku93phvb3/dapaguvase.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8abbf3986a---99638418515.pdfIn PDF document text
- http://luluscafeonline.com/uploads/files/16543926485.pdfIn PDF document text
- http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/bavude.pdfIn PDF document text
- https://marblo.com/app/webroot/img/files/94846992513.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/1e47edfd74d9e844ae4a06b2818b8247/nugopusag.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ler+livros+online+gratis+50+tons+de+liberdade+vers%C3%A3o+greyPDF 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_off0000f1d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1D8	19108 bytes
SHA-256: `799be44c446d7359b2f68de891e8c0872ed57d0322dfd092d5bfff2bd7426d95`
`font_01_sfnt_off0001217c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1217C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013993.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13993	11224 bytes
SHA-256: `5b5a877d994ebb1a169376244595de39f1173ee424947d6dfaa83b92526b6c54`

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