PDF malware analysis — malicious · 6a509073f0be7495

MALICIOUS

PDF

84.5 KB Created: 2021-07-01 09:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 38838b000bb7b7713beac992bb012b80 SHA-1: dd2d22dc4912dae8c07eee04ced1096a033c66b3 SHA-256: 6a509073f0be749531ae7f0de42a3d22e0660d75a192738961ca49f813f281a0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farm characteristics indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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
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://smidgel.ru/uplcv?utm_term=changing+fonts+in+pdf PDF link annotation
- https://goldenapp.net/file/71812253575.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/596ac513b64e5d84a586c878bf240a5b/bifuxogabudofeguxe.pdfIn PDF document text
- https://wodepcb.cn/uploadfiles/files/64893953769.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d23e85852---gevotugut.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fe14a5b4a---52669234668.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/gucmaqa55g1n0s1vfsm41c8823/bibabigotuvufefawofapemut.pdfIn PDF document text
- http://serdceprirody.ru/userfiles/file/suwogeg.pdfIn PDF document text
- https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/bp4m34re0n6fejpdc05n1s5nc1/7342036664.pdfIn PDF document text
- http://dermaktif.com/imgup/file/lewosumexuvamonisav.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/2039c411669bab41ce61efeceeb47581/vebafajubipupawanobuzoben.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f1471d29---61735094625.pdfIn PDF document text
- http://tw-sincere.com/upfiles/editor/files/84800132298.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812e8b494cf---3447596989.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0f820503ee0c5e4e93cd7a32d71f406a/nowimadijevifutenani.pdfIn PDF document text
- http://healingtown.org/userData/board/file/58867391456.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c274969eb3---vadiji.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160841a9d4827c---11929659922.pdfIn PDF document text
- http://hainescentreasia.com/images/file/54909703364.pdfIn PDF document text
- https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e303c9c571---6530301622.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/g5kbl4bqpkosdnet93o89ecpc1/32361164650.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ecb22ef45---bapabaduvuma.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609867e8e240b---98023762206.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f4c95d541f126b8a30f1e3826c25d006/gigajunazowejokeworo.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/h6fdnhis4f1llh0gft138cdr80/74237518625.pdfIn PDF document text
- http://perfecturology.cafe24.com/upload/editor/imagefile/93779907528.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://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_off0000e6f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6F4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ff0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF0B	10532 bytes
SHA-256: `0fb76e174387bbbfd4c8650298bdfff3782f85b443855d37fe27859da208f605`
`font_02_sfnt_off000116c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116C5	17460 bytes
SHA-256: `68540d5b23809bee6a07293550a5445b8434d90e28fd2630c76278b651330962`

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