Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4d3d25423f7546…

MALICIOUS

PDF

78.5 KB Created: 2021-04-21 16:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fdbb5af08ffd3db149632fb41731472 SHA-1: 9fddd89b818b4a0c8bb107c53ab06aacb98b2e0c SHA-256: ed4d3d25423f7546bbc5d4b6943398d40e813cb8d6dbba7100ea41ce48d13b03
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://crophysi.ru/strik?utm_term=attack+on+titan+real+life+characters PDF link annotation
    • https://cdn.sqhk.co/vuxeneson/gdicvdM/ironheart_movie_1992.pdfIn PDF document text
    • http://futubog.22web.org/job_description_details_template_doc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_604ccaab5ab88.pdfIn PDF document text
    • http://axecheat7.xyz/youtube_herbie_hancock_maiden_voyage_full_albuml681y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_606376021e581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_6064ef4022f18.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/jjajfXS/about_us_template_html.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/gda4eid/80_90_hits_rock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_5fd177525f383.pdfIn PDF document text
    • http://blancop.xyz/lekoxenodub8frvq.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/gexgfjW/63497357875.pdfIn PDF document text
    • http://figironeme.22web.org/47715805348.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/vavabi/hamilton_beach_48464_coffee_maker_manual.pdfIn PDF document text
    • http://fezifax.rf.gd/stories_to_read.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_c751213ebf03420d8dcef7f69c28f1ed.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_a0430946f04a46d994346d7330d6276a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kumasala/panoxojoxoropib.pdfIn PDF document text
    • http://joriboka.epizy.com/gallagher_representative_government_in_modern_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/dutobavoj.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/24149630361.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/resumen_de_el_libro_manifiesto_comunista.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_0436b23ae14b4a25bcf68155ef0a6fec.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_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 5024 bytes
SHA-256: 2d920b461c2aed2c67175bb2c411f90efe91b57843d66d4edcc2561af1ba796a
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 11400 bytes
SHA-256: 9d37c2296fc5370fc8de8d914dd452e8de343fd72e2d606c244d99b32e887a65

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