PDF malware analysis — malicious · 6217ae3982f405b4

MALICIOUS

PDF

76.2 KB Created: 2021-04-21 19:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 6d7d40e34678e6d41f1ddb4f4d49980b SHA-1: 750f9731e00584f3935fbab5bf6f9a83e4c64e95 SHA-256: 6217ae3982f405b45c4adadb4631438ddec4f6df15f012681b9509eae6bc766b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm designed to deceive users. The presence of a URL like 'https://midufefew.ru/strik?utm_term=paint+net+download+dotpdn' indicates a lure for software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://midufefew.ru/strik?utm_term=paint+net+download+dotpdn PDF link annotation
- https://fovibera.weebly.com/uploads/1/3/5/3/135324383/d8ed3dcd0d0d14.pdfIn PDF document text
- https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/gebuzovon.pdfIn PDF document text
- https://topifovav.weebly.com/uploads/1/3/4/5/134595147/vodunemafaw.pdfIn PDF document text
- https://dutazimu.weebly.com/uploads/1/3/4/8/134878831/7497158.pdfIn PDF document text
- https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/fa8493ec7d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/lorerexeg/xogaxawuwalilopiga.pdfIn PDF document text
- http://gejevebo.epizy.com/buderus_logano_g215_user_manual.pdfIn PDF document text
- https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_a3c0deecd5e541d3b0a1523e0e43ff10.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/polojuliragam/vomotot.pdfIn PDF document text
- https://s3.amazonaws.com/sabobenuwe/femorajibasitavaxaso.pdfIn PDF document text
- https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_2b4f4e0a49f545f0997504bda905af4b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kovezux/bomitaxumufutanazodowero.pdfIn PDF document text
- https://s3.amazonaws.com/vawoginele/sibit.pdfIn PDF document text
- https://s3.amazonaws.com/wizuluworafid/huckleberry_finn_chapter_20-25_summary.pdfIn PDF document text
- https://s3.amazonaws.com/tuxalowafokuvo/girard_tankless_water_heater_installation_manual.pdfIn PDF document text
- https://s3.amazonaws.com/subopukomanaw/olympus_om_1_lens_hood.pdfIn PDF document text
- https://s3.amazonaws.com/sojenozap/what_it_feels_like_to_float_book.pdfIn PDF document text
- http://fafusew.rf.gd/all_shook_up_can_t_help_falling_in_love.pdfIn PDF document text
- https://s3.amazonaws.com/wikurixobelu/what_to_say_when_a_client_has_a_death_in_the_family.pdfIn PDF document text
- https://s3.amazonaws.com/jadere/netbeans_php_windows_7.pdfIn PDF document text
- https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_40d43a84a2a34293b9755e2482b2d265.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vibuvomomuv/13714804059.pdfIn PDF document text
- https://s3.amazonaws.com/tupofelasujewas/gebunivuruweva.pdfIn PDF document text
- https://3557a179-a1ee-4801-a209-85ad6f504536.filesusr.com/ugd/9c409a_f5c50d2ca836402580fe2d159de3bbf4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/feliso/the_rational_male_book_review.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ecda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECDA	4772 bytes
SHA-256: `18f76abfdf9f374c701a4bb65642a59ab86c624f21c7b66dfab57f5303bebca2`
`font_01_sfnt_off0000fd3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3B	10960 bytes
SHA-256: `e55a9f98839616da8e7d8208218a2a9ad9073d2b9531d9b01ccf2fc8a7d5fece`

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