PDF malware analysis — malicious · 0b3ef4dbf475a94a

MALICIOUS

PDF

79.2 KB Created: 2020-12-22 13:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: bc3db582353214202545cfec02d62773 SHA-1: cb9e56e607e266aa8e43807b88853af111400ca0 SHA-256: 0b3ef4dbf475a94aaaddbac6307c9d9a3062c539505298880db52fe39d5f6730

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click on a link, likely for phishing or to download a secondary payload. No scripts were extracted, but the presence of malicious URLs is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/strik?utm_term=5+leaps%2528+space+tower+defense%2529 In PDF document text
- https://cdn-cms.f-static.net/uploads/4413468/normal_5f94f536902d6.pdfIn PDF document text
- https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.pdfIn PDF document text
- https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/bogixigavov-kugisapuzuziju-dumunowi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416791/normal_5f9b3002d3d4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462056/normal_5fd115ac6604d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405687/normal_5fe0ff29a2d54.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374175/normal_5fd97866a8e8b.pdfIn PDF document text
- https://vomogavuxif.weebly.com/uploads/1/3/4/7/134762738/9354609.pdfIn PDF document text
- https://figerifefiter.weebly.com/uploads/1/3/4/3/134343277/35e6fbbca27.pdfIn PDF document text
- https://nusokusin.weebly.com/uploads/1/3/4/3/134350978/6103336.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://uploads.strikinglycdn.com/files/18603611-5c00-4c76-9cb9-211c81344c7e/chess_fundamentals_jose_raul_capabla.pdfIn PDF document text
- https://s3.amazonaws.com/fexuror/bulukepufowemiforixu.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc29c05a3bf4b14abb4035c/t/5fc62d703f75b16643a6ca0f/1606823282192/10253218168.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fca6ba26cb6d01b09c30015/1607101346717/89337694270.pdfIn PDF document text
- https://s3.amazonaws.com/feliso/wondershareelement_ocr_crack.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51793201-e45d-4c93-bd93-fed14ea24772/dewalt_generator_7000_owners_manual.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d50d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD50D	5164 bytes
SHA-256: `decfe4211452cee58be7d281570f12608ad72ba226400ad905e1a42a16c6efc2`
`font_01_sfnt_off0000e6c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6C2	11032 bytes
SHA-256: `6471431f226b09acfce4ab77fc2aea6aba2dd2a0e585816c6624e432d2423177`
`font_02_sfnt_off000109f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F6	16624 bytes
SHA-256: `02073a00624e9839486bc477dcf7582a1d7995e59cff09053c97f782ddd2a084`
`font_03_sfnt_off000120fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120FB	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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