PDF malware analysis — malicious · 5a4a69847bd5d46f

MALICIOUS

PDF

90.9 KB Created: 2021-04-09 17:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 475edefb27948ce3e351614b260398cf SHA-1: 7b591da77d2c846408860e038bb5dd9d8e90929d SHA-256: 5a4a69847bd5d46f1f71b0dbb151bebad9a4e4ac0855a579a495b4137d6dbf38

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'jumiwimov.ru', suggesting a phishing or redirection attempt. The PDF structure and embedded content indicate it's part of a link farm designed to obscure the ultimate destination and evade initial detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/strik?utm_term=firehawk+fx+looper PDF link annotation
- https://zojopufowe.weebly.com/uploads/1/3/4/5/134523349/buginasidax-kigusiwa-faxadatevagako-rijejelal.pdfIn PDF document text
- https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/remin-xosogipize.pdfIn PDF document text
- https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/libixel.pdfIn PDF document text
- http://savineme.mywebcommunity.org/33938862635.pdfIn PDF document text
- http://sdfsdfsdf.shaketorch.com/77426453619.pdfIn PDF document text
- https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/nujamigokoloji.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/26f1ce8f-cdea-485b-b6dc-efd1a778fc53/beseli.pdfIn PDF document text
- https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_eb28f13553fa4cc99788718717a08950.pdf?index=trueIn PDF document text
- https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_66f78221b9b244fd84f1ce12dba8a1ce.pdf?index=trueIn PDF document text
- https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_7d6794526828456e8192cca5cee2d667.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pivetuzadujo/after_the_trade_is_made_david_weiss.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c58d84ec-0312-449b-bf65-4d1bb57778d4/dell_latitude_d820_cpu_upgrade.pdfIn PDF document text
- https://s3.amazonaws.com/norozovijalu/2778047092.pdfIn PDF document text
- http://kubitilabevovup.rf.gd/molatesuradozafonojomu.pdfIn PDF document text
- https://s3.amazonaws.com/silubebebefuju/21164981744.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db97a89b-1a02-4031-a8ec-4bd03f2c4133/how_to_write_a_voided_blank_check.pdfIn PDF document text
- https://s3.amazonaws.com/faxaxos/22308663071.pdfIn PDF document text
- http://fuvuvadut.onlinewebshop.net/adrenal_incidentaloma_guidelines.pdfIn PDF document text
- http://tivakifuzir.atwebpages.com/saramorowesizizabuxij.pdfIn PDF document text
- https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_ffbce2d0f268408c929a9bf513aaa70c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tetofamuxulil/intermolecular_forces_of_attraction_worksheet_with_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34c02192-62ed-483f-b1cf-71d9608ba9b3/72818033608.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_off0001196c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1196C	4592 bytes
SHA-256: `cf31f2f86630ab2d1edeb18d739e1826eccb75086e04848b5c19d251e1c169bf`
`font_01_sfnt_off00012927.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12927	10984 bytes
SHA-256: `837ee617dff2b91cc281946280ad28f37cc69e5041f7e5ac8d4e3ce81030ad71`
`font_02_sfnt_off00014f04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14F04	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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