PDF malware analysis — malicious · 6c9dac86d696f89c

MALICIOUS

PDF

88.9 KB Created: 2021-05-31 03:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: e4b61413eaf009592fc9ff39814a19e3 SHA-1: c8c93a6965d59dedc7f4c08cfee8d986b1d7c47b SHA-256: 6c9dac86d696f89cbca283f3dc1a78df8a284512d95bdae5fbe397cfa8b11662

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to benign content, but one primary URL, 'https://mezovuduv.ru/strik?utm_term=50+verbos+irregulares+mas+usados+en+ingles+presente+pasado+y+participio', is flagged as unknown and is likely the malicious destination. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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=50+verbos+irregulares+mas+usados+en+ingles+presente+pasado+y+participio PDF link annotation
- https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/9cf53de22ac.pdfIn PDF document text
- https://garaxawodipadi.weebly.com/uploads/1/3/4/5/134595678/penibemak.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451561/normal_5fd1b83ad5318.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413843/normal_6034566ae3b71.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4492575/normal_5ff9e0a0c52a0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457857/normal_60512a8a7b982.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425235/normal_606c831e4ef6c.pdfIn PDF document text
- https://lonapumerupa.weebly.com/uploads/1/3/4/8/134853684/01dc3874245.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366382/normal_6041af075319b.pdfIn PDF document text
- https://jorazejub.weebly.com/uploads/1/3/2/6/132695428/luriteginolarojowiga.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407066/normal_5fefcefa06708.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/dbce7bdb-6315-4180-9df8-58ccb43b1387/canon_powershot_elph_350_hs_wifi_setup.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd5311be-14a3-4b46-ac8b-bdba4e34a8b4/84826068196.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fd5056e6-804f-4917-9903-71fe3d8e9352/where_can_i_get_a_stray_cat_neutered.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3413cd1d-dfc3-41be-bbff-b2c7bec0cfd4/92773876632.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff2cae2b-0dca-4a90-b829-624fe61fb39a/fikasibakesusubesu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/be702ee8-ef7d-4649-ae82-1fb3fee5de58/how_to_use_autocad_2010_for_beginners.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/17b9bd4f-f81b-4891-b36f-d05747171782/simplehuman_tension_shower_caddy_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b069473-6bd3-4044-8274-caf0d8ddf20b/kedelogefenek.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/953aa376-8a44-4af0-bb2f-c8a54bed696f/mcp61pm_hm_audio_drivers_windows_7.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/87d89133-5a3b-420d-a5df-5ea481c208b8/how_to_become_a_good_med_surg_nurse.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/98630b98-d7fe-4fdd-bf9d-1bcb2a3dda0b/starbucks_barista_espresso_machine_troubleshooting.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7b7aef50-80fd-42c9-8040-dce92da5a53a/how_to_find_post_office_phone_number.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/955b9e3d-13ef-498f-8950-b27fdc5beaf5/46470457952.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
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000102f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102F7	5864 bytes
SHA-256: `04ad53bb61b293c3659604df00d40c0d176c387866843c4b7e79c2a5689607d8`
`font_01_sfnt_off000116dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116DC	11708 bytes
SHA-256: `9105e4810dd19991bdf169a2935846dde5a7d362128f7c935594b79fb15d09fc`
`font_02_sfnt_off00013d7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D7B	16204 bytes
SHA-256: `541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501`

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