PDF malware analysis — malicious · ccc1c58d58884932

MALICIOUS

PDF

85.0 KB Created: 2021-05-25 17:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: da8e41fa6ffef5eb1d0a0247e2aa3de9 SHA-1: f8073850df344af142df3660c943715451ef294c SHA-256: ccc1c58d58884932499bd5a8e291fa291725375addcf5400d9d767e3bf4fa6de

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The primary malicious URL identified is mezovuduw.ru, which is likely used to host phishing content or a second-stage payload. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9887

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://mezovuduw.ru/strik?utm_term=why+is+water+a+good+solvent+for+benzoic+acid PDF link annotation
- https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/magifebogumifoziwi.pdfIn PDF document text
- https://seruliwosudaz.weebly.com/uploads/1/3/4/4/134457931/donaxudofu_danajijid_gazokusixew_miziriji.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465259/normal_6024422561850.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425768/normal_6027a4001233b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369773/normal_600d8aec84d2e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366665/normal_5fccc018e3438.pdfIn PDF document text
- https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/kojurupoke.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391620/normal_5ffa8b1ecfac9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390057/normal_600804777ab72.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382618/normal_6041a1ec56e15.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4462046/normal_600210b5ba68c.pdfIn PDF document text
- https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/rojazek.pdfIn PDF document text
- https://ligelonajoka.weebly.com/uploads/1/3/1/4/131407163/34ebc1a8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/9742b207-8f8f-4516-b99b-f89afe887bbb/vebowewewa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b85db0b-34b9-4065-80a2-cd4418fd8014/1224383053.pdfIn PDF document text
- https://s3.amazonaws.com/rorives/ib_graph_paper.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/58b3f0dd-1780-46f2-be2f-c1bca7ff6e2d/urge_basics_soundbrick_manual.pdfIn PDF document text
- https://s3.amazonaws.com/lazesej/sekixag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/135c7bdd-6c61-4697-8dec-0b9d9269712f/2810017087.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d9fc07f9-9ebc-4591-9dc9-46f4e4e6c46e/67964137654.pdfIn PDF document text
- https://s3.amazonaws.com/sitok/39411203872.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f970d85f-4564-4c6e-8387-7e7c267c1421/7462271353.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c862540-9266-499e-833a-3854b8d39fa2/76969154332.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cdbc3906-a70f-4b3f-9f03-91d5f0ffb4ea/44803043042.pdfIn PDF document text
- https://s3.amazonaws.com/xisakazelelinim/42191419316.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3e2f8b2-3df1-45df-a8a8-aeed9f2bb84e/makita_ls1013_review.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e6c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6C4	6408 bytes
SHA-256: `b11dc75762f4c29ece9f6891a1b5234c03bfe79a09fa3ce97f387f7e0d856b05`
`font_01_sfnt_off0000f69c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69C	5740 bytes
SHA-256: `b95b09d0a0ccec09a590c5a02b599c928eeeed3b4241cbee33dcdcd4ac9ad2ab`
`font_02_sfnt_off00010a57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A57	11140 bytes
SHA-256: `68386acf6a256e25a98586bc0058d223c69895cd7212383e4a8a5fc49eaa14bc`
`font_03_sfnt_off00013028.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13028	16060 bytes
SHA-256: `84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727`

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