PDF malware analysis — malicious · 7f393af8ebd5b34e

MALICIOUS

PDF

83.3 KB Created: 2021-03-19 07:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: d5c1cbc40dafc5f462615b9849eb8d1c SHA-1: ecdfcb39f3ad71508441f6903bfc26a0c5e6e36b SHA-256: 7f393af8ebd5b34e140e673bfa920afe6e92b486fb2412caee0b99e4de14939f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. 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 0.9992

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 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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/123?utm_term=consultant+agreement+template+australia PDF link annotation
- https://cdn-cms.f-static.net/uploads/4450514/normal_604d1dc795bbe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4477655/normal_5fc7f9f412a6d.pdfIn PDF document text
- http://xasedogamif.mypressonline.com/babcock_and_wilcox_water_tube_boiler.pdfIn PDF document text
- http://xemakaze.mywebcommunity.org/11867449359.pdfIn PDF document text
- https://cdn.sqhk.co/durotula/8ia9o2B/91799394493.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495065/normal_602f6d81ba884.pdfIn PDF document text
- http://kexumojazo.mypressonline.com/biblia_cristiana_de_estudio.pdfIn PDF document text
- https://cdn.sqhk.co/loxexafetivu/idGib54/vezelo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382192/normal_60175e8e1fd92.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403556/normal_600e286f68bcd.pdfIn PDF document text
- https://cdn.sqhk.co/wanazofemuvu/iPigLhi/marshmello_helmet_plastic.pdfIn PDF document text
- http://suxoxaxowigab.scienceontheweb.net/world_cup_match_time_table_2020.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470218/normal_5fdd93f4c3ea0.pdfIn PDF document text
- https://cdn.sqhk.co/segenapiza/PzhbNhh/lovecraft_country_synopsis_episode_5.pdfIn PDF document text
- https://cdn.sqhk.co/xasakeza/ha3gi9b/colorchecker_passport_photo_2_davinci_resolve.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389603/normal_604cc764a7f24.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376101/normal_5fdb784295ca1.pdfIn PDF document text
- https://cdn.sqhk.co/juxerawabuf/Njh6igK/text_sms_marketing_for_your_business._unlimited._com.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446147/normal_603d2c2e23499.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485946/normal_5fe8488ce3f55.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
- http://jurizamumi.myartsonline.com/flat_belly_diet_menu.pdfIn PDF document text
- http://genolesatoj.epizy.com/buwisixugomekoxog.pdfIn PDF document text
- http://gumofiwulova.epizy.com/18896719277.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_off0000fb26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB26	5044 bytes
SHA-256: `b0763bfe0b4da57f00d4407a6a11ec4d0933d90057c56baaa5fef7f442936668`
`font_01_sfnt_off00010c35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C35	10848 bytes
SHA-256: `a60bf75ea82df7679bef6ce1e4a6d007f08d66800c08ce6fa5854f4c4229877c`
`font_02_sfnt_off00013165.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13165	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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