PDF malware analysis — malicious · a5dff2b79419f71f

MALICIOUS

PDF

78.9 KB Created: 2021-06-21 06:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 5c83a0d527233f9b81ffb592927364b1 SHA-1: 1341b1f6d240861c4a7c2ba3c10930249753ac10 SHA-256: a5dff2b79419f71fb93ee6a6c9d337a1ac0bd0d88e69159b59902d0d0bb03db1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on compromised CMS uploads and disposable domains. The embedded URLs suggest an attempt to lure victims to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9594

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://inwebjor.ru/uplcv?utm_term=how+to+do+champion+mipha%2527s+song PDF link annotation
- https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/0vi74ghpkb2ssfl2huenc2b9cb/35130274920.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/056fabadaf38e7d8e98c7561a1fe1d51/10409277280.pdfIn PDF document text
- http://cafemsoffice.com/userfiles/files/47256984920.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/gogufibibekanevawup.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080845e18995---fasatukifaxovizofefejen.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ca069b151---31751250414.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ffden4quvugj419al2ejsnh9iq/kavolep.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/fae79af2abc8211a34fbc5b56beaa4d0/15319414271.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/81c4f527864dd841748ce8d44c67a79a/45874951488.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8c4274991b05a3fd92076507b3bc3c2d/girite.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/feifa9o2f4l1dn6r5a7c5etp1q/20889289717.pdfIn PDF document text
- http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7dcd5b6cba501063921e9a617c38f8d8/xapimidudisox.pdfIn PDF document text
- https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/ec9fb3923d1f7ea1570b0d6c8ae72e3c/59994407112.pdfIn PDF document text
- http://wu-pao.com/upfiles/editor/files/8870221733.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c22fc879a1---3258838777.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1395b6161---84663588714.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac45ad64d---51533877733.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4789fd696d---97247166040.pdfIn PDF document text
- http://ecompletecontact.com/ckfinder/userfiles/files/94271223837.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000101cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101CC	5448 bytes
SHA-256: `8e19fa3e7333ccb0f2bcc9110c28aa538b2f3f2c545f88101df6886fb91d8bdd`
`font_01_sfnt_off00011448.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11448	10404 bytes
SHA-256: `6b0e7806c8610f05b5481eec03b92929ce239a4b6cbf052269581be87dff3c54`

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