PDF malware analysis — malicious · c195541398c6422e

MALICIOUS

PDF

83.1 KB Created: 2021-03-24 02:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 496ad4747d0fd919ad160b1d0d6e674e SHA-1: 77c5b16612f2c3736caf59c738f9ae3e6efdbefb SHA-256: c195541398c6422e95b27872f67187e8dabdc360f1bf5322f2e20db6ead123bf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent link pointing to a suspicious domain ('xajibur.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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://xajibur.ru/strik?utm_term=cbse+grade+1+english+textbook+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4375206/normal_6002488f1e3b4.pdfIn PDF document text
- http://jekefidaz.mygamesonline.org/descargar_biblia_de_estudio_thompson_reina_valera_1960_gratis.pdfIn PDF document text
- http://kidupat.getenjoyment.net/why_is_the_online_light_on_my_xfinity_modem_blinking.pdfIn PDF document text
- http://gojovujewinunuj.mygamesonline.org/romejirapiti.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4469834/normal_5fe000e21b317.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402737/normal_6009e55805189.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_d9f935dae8fe475580360b0a7d4ca613.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/desenaz/free_ancient_civilizations_worksheets.pdfIn PDF document text
- https://s3.amazonaws.com/kosipefojaw/79452906275.pdfIn PDF document text
- https://s3.amazonaws.com/minabiwa/oster_food_processor_lid_wont_lock.pdfIn PDF document text
- http://wugetad.myartsonline.com/what_is_the_best_whitening_cream_for_dark_skin.pdfIn PDF document text
- https://s3.amazonaws.com/taguxif/is_nancy_drew_going_to_be_on_netflix.pdfIn PDF document text
- https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_a60afe1874bd48f4abd29be9ca1cccaf.pdf?index=trueIn PDF document text
- https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_56852cee52c645c4aef9692689730f14.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wemupajese/market_leader_upper_intermediate_answer_key.pdfIn PDF document text
- https://s3.amazonaws.com/tasufagijaremo/how_to_calculate_heat_exchanger_size.pdfIn PDF document text
- https://s3.amazonaws.com/tuxexi/yard_sale_checklist.pdfIn PDF document text
- https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_8723b094d0c54e0d98bab2674e91d3e1.pdf?index=trueIn PDF document text
- http://gejizejaniwijef.atwebpages.com/siwasuwutumixebaroma.pdfIn PDF document text
- https://s3.amazonaws.com/rekorewexidiwo/corrugated_sheet_manufacturers_philippines.pdfIn PDF document text
- https://s3.amazonaws.com/pajeriramal/how_to_assess_for_bipolar.pdfIn PDF document text
- https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_975e518166954d3fbca1adda09c65732.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pulujolatepuv/neguxipewami.pdfIn PDF document text
- http://gogujigasad.onlinewebshop.net/uwc_academic_calendar_2020.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFAF	5532 bytes
SHA-256: `08194fff6e5345c57228421f54849d9fec17cc2a753ac7da7b12c3d243d7f57f`
`font_01_sfnt_off0001026f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1026F	11360 bytes
SHA-256: `933f75829331a3a6a215b31ee38b96a922abe39a5811e7b17260a389156f6a1e`
`font_02_sfnt_off00012965.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12965	16164 bytes
SHA-256: `c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e`

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