Malicious PDF — malware analysis report

Static analysis result for SHA-256 37da1f4002a81851…

MALICIOUS

PDF

90.0 KB Created: 2021-04-12 21:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 834ae8613526bc2e9239f645c4714403 SHA-1: 9db0bffcffd3f24b47fcb452d5898f900b028469 SHA-256: 37da1f4002a818518c42e3ca9d127f0a9181a6b7c2b7931e71abce267fe64d5c
186 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. 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 0.9998

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://mezovuduw.ru/strik?utm_term=how+to+fill+out+d+and+d+character+sheet PDF link annotation
    • http://wildboost.club/driver_finder_crack_3.6.2p5r5t.pdfIn PDF document text
    • http://hyipinvest.site/cost_driver_english_meaning_definitioniw8vu.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/apa_referencing_style_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/iegiEgf/17849098944.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/warranty_administrator_job_description.pdfIn PDF document text
    • http://iciapp.xyz/714987642346jwti.pdfIn PDF document text
    • http://geesecam.com/invisible_cities_italo_calvino_abebooks01jyr.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Dgc92je/72365597520.pdfIn PDF document text
    • http://aazzzry.space/why_does_the_blue_light_flashing_on_my_hp_printertsepu.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/aiggzgh/supercars_for_sale_under_100k.pdfIn PDF document text
    • http://yoptan.space/toddler_poncho_patterne3m7g.pdfIn PDF document text
    • http://hisgohar.site/whirlpool_washing_machine_resettd89f.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/1Kdjehf/zebirinitamogaxaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_7d757f3feb2843c2a32aed31c5f6635c.pdf?index=trueIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_d4a24921882c4f2db6451406eff5096d.pdf?index=trueIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/elite_platinum_pressure_cooker_troubleshooting.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_0b102e2577734d53b9f784988923e220.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_9d8c7ccacb4941c4b6180534a6b8f9df.pdf?index=trueIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_05fb3e166dc74d0c96bf600bcd3b92d5.pdf?index=trueIn PDF document text
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_34474470d87c4b6ca27ae749c6b5d47b.pdf?index=trueIn 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.

FilenameKindSourceSize
font_00_sfnt_off00012386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 5160 bytes
SHA-256: 19235c05425bd361bf79ea6ae4afe3721eac75e10aa783b4d7958bc01e238dd1
font_01_sfnt_off00013522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 11004 bytes
SHA-256: 3e53fa3502872e249528d67bc44e853fcafce2e844612f79fad56a2f2c2b4006

Open this report in the interactive analyzer, or submit your own file for analysis.