PDF malware analysis — malicious · 21e9b5d81569c8c2

MALICIOUS

PDF

133.6 KB Created: 2021-03-11 13:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 87b1e4a0c4f924eaedf9d969fe437beb SHA-1: c0acc8d9583acecf1c2d0835795a9caf7cad3e07 SHA-256: 21e9b5d81569c8c2518aaaaec69b8c2ddca6fbd422d130a461e2c99826e71a52

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9959

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 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://soxebez.ru/award?keyword=agriculture+sector+in+maharashtra+pdf PDF link annotation
- http://luchdobro.site/72284020161qqooi.pdfIn PDF document text
- https://nitejaxerovon.weebly.com/uploads/1/3/1/3/131379530/2373059.pdfIn PDF document text
- http://xisubov.iblogger.org/annual_leave_form_template_nz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385635/normal_602a42779f48d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393898/normal_6019f0c935db2.pdfIn PDF document text
- https://gijamaxo.weebly.com/uploads/1/3/0/7/130740113/2617807.pdfIn PDF document text
- https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/vaxisowipenabuje.pdfIn PDF document text
- https://pufoxufuzevelo.weebly.com/uploads/1/3/4/4/134486621/nixibi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501965/normal_600867c96538b.pdfIn PDF document text
- http://lojapidabud.mypressonline.com/64653191383.pdfIn PDF document text
- http://fitatuvepejozo.sportsontheweb.net/95294769352.pdfIn PDF document text
- http://lokotahas.ru/wozagi7g6rv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417313/normal_6042f8d7a8878.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484115/normal_600c522077ef2.pdfIn PDF document text
- http://mitisavad.getenjoyment.net/how_to_renew_red_cross_lifeguard_certification.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383561/normal_5fe91bcdda52f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4452862/normal_6001fe732a19a.pdfIn PDF document text
- http://lumacy.site/tepalopixiqp8ub.pdfIn PDF document text
- http://sigisuzuk.getenjoyment.net/46585548800.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://merizipu.rf.gd/arsenal_vs_chelsea_highlights_today.pdfIn PDF document text
- http://voxotili.epizy.com/54625169435.pdfIn PDF document text
- http://zupitatip.atwebpages.com/astronomy_and_the_relativistic_doppler_shift_mastering_physics.pdfIn PDF document text
- http://rolozipufulelo.rf.gd/what_is_microsoft_system_clr_types_for_sql_server.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_off0001a7d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A7D4	5556 bytes
SHA-256: `48137b486ac80d6c15dba7a33c1ea7e0df7710b457e5196f53b1ad732e7e9297`
`font_01_sfnt_off0001ba93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BA93	11084 bytes
SHA-256: `5c69ef72dc2935c3274df3fafdaa6ab0c1a1f55406f25b4311d35fa1c57b158c`
`font_02_sfnt_off0001e0ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E0CA	16164 bytes
SHA-256: `ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1`
`font_03_sfnt_off0001f61e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F61E	4800 bytes
SHA-256: `c6df59100deb9e79d86df61a0ce3e9ee2cdfeac91b0f4f2dfb5fa7ffcbde2c70`

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