PDF malware analysis — malicious · 9be18066fd05570c

MALICIOUS

PDF

80.5 KB Created: 2021-03-11 21:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: 6321254b4f14ff420a83d7c9e64b7214 SHA-1: 711144b11273d0e4f87c4a6d9f70e0cbc0e72cc7 SHA-256: 9be18066fd05570ce9f5fa72c6efcb6e1c7836e6d6ce851c70b3d6889b6b0e2a

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many of which are generated SEO-style, suggesting a link farm or phishing attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be trying to trick users into believing they need a password for an archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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
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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://leonvi.ru/award?keyword=unlock+secured+pdf+bluebeam PDF link annotation
- https://static.s123-cdn-static.com/uploads/4458854/normal_5fce85e225b97.pdfIn PDF document text
- https://cdn.sqhk.co/fumodolanes/afsjadt/mobile_data_switches_on_automatically.pdfIn PDF document text
- https://nefarixutasirov.weebly.com/uploads/1/3/1/6/131606035/wiwabozabeg.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411686/normal_5fde68753a30e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368978/normal_6037747ce89ed.pdfIn PDF document text
- https://cdn.sqhk.co/dudumadopole/ajijigc/so_feisty_in_spanish.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408984/normal_5fc949375f2ac.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412378/normal_5fcda05195987.pdfIn PDF document text
- https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/7621218.pdfIn PDF document text
- https://cdn.sqhk.co/kitatoze/hhcAjKg/wokonijuzevijogugadowuman.pdfIn PDF document text
- https://cdn.sqhk.co/pamavunawi/fhcK4ig/1_to_100_numbers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491925/normal_602f44386ea3a.pdfIn PDF document text
- https://cdn.sqhk.co/javijaxim/UjciieY/zusunufibavagev.pdfIn PDF document text
- https://cdn.sqhk.co/jipodipotaj/cS6gj35/sizudejevaveb.pdfIn PDF document text
- https://cdn.sqhk.co/lazujanaziri/higcUNS/rgb_color_picker_white.pdfIn PDF document text
- https://cdn.sqhk.co/sunomedude/ijj7hf1/evowars._io_hack_online.pdfIn PDF document text
- https://cdn.sqhk.co/joziroluxu/txriaTU/rail_rush_game_unblocked.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443617/normal_5fe04723b1431.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4371020/normal_5ff6729960d92.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461481/normal_600a3c522ed2f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485156/normal_5fe16b9bf23bc.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/wewiro/nowolunezoge.pdfIn PDF document text
- https://s3.amazonaws.com/zumomasugipeno/biopsicologia_pinel_libro.pdfIn PDF document text
- https://s3.amazonaws.com/bitajemisajoz/notizaboluj.pdfIn PDF document text
- https://s3.amazonaws.com/risisipajole/dawonowamej.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f106.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF106	5252 bytes
SHA-256: `8602147f955dfcfbf945def3241f93c5276135cfebea3ffefc382297cf7ffab0`
`font_01_sfnt_off000102be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102BE	10456 bytes
SHA-256: `e314d700c5045bb4c530cd632b9d174bd1d2b09790aa2ed1f2f72d44ca3e8b1a`
`font_02_sfnt_off0001268e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1268E	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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