PDF malware analysis — malicious · 5461a9da4271330c

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 21:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 3a1ce776a2f1eb6d8415966334462bb8 SHA-1: 6d7d08a1b5dcd5385c52c0810617a932421ca171 SHA-256: 5461a9da4271330cf47138f8b8bc4fa5eb9232b7e08435ee956fa054dcb813b6

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'brother mfc 7420 service manual pdf', indicating a lure to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
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://xezojetit.ru/aws?utm_term=brother+mfc+7420+service+manual+pdf PDF link annotation
- https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/fajevikigurikov.pdfIn PDF document text
- https://jabiwogox.weebly.com/uploads/1/3/1/4/131453485/5781889.pdfIn PDF document text
- https://cdn.sqhk.co/xorilulog/iaRjchi/frontline_commando_d_day_apk_obb.pdfIn PDF document text
- https://cdn.sqhk.co/vevajewez/gRfgigh/flying_bird_toy_on_a_string.pdfIn PDF document text
- https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/xejomogi.pdfIn PDF document text
- https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/8057357.pdfIn PDF document text
- https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/zujitarodizomiduj.pdfIn PDF document text
- http://jivopifavu.22web.org/68295763218.pdfIn PDF document text
- https://xoxulesajoxe.weebly.com/uploads/1/3/1/4/131438427/1913615.pdfIn PDF document text
- http://zurujavurobe.scienceontheweb.net/affairscloud_puzzle.pdfIn PDF document text
- https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/kalomuxizujimid_ridodu.pdfIn PDF document text
- http://fasekafalig.scienceontheweb.net/66127596849.pdfIn PDF document text
- https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/6013880.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://rukapanaped.epizy.com/21223953245.pdfIn PDF document text
- https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_a1b3452fbcce491f84bc9bd2c67db654.pdf?index=trueIn PDF document text
- https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_c565da21046f4b59bbf37cfcafdb40b3.pdf?index=trueIn PDF document text
- http://xukokumo.myartsonline.com/badass_gaelic_names.pdfIn PDF document text
- http://kedisijusa.onlinewebshop.net/22650519704.pdfIn PDF document text
- https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_80c5cf65337a4a9fad638d67bcc8922f.pdf?index=trueIn PDF document text
- http://medexode.atwebpages.com/seepage_analysis_of_soil.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_off0000ec41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC41	5828 bytes
SHA-256: `57cb2152284a15688d412cc4e67bd205c98eb1c2e47f6304b1319b09b2f94f4f`
`font_01_sfnt_off0000fffd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFFD	11300 bytes
SHA-256: `0d7ead6bd2eb0953dd94f3478962eaa4848f07e3d418667fb4ef9c95a25f74cc`
`font_02_sfnt_off0001265c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1265C	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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