Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df2a4e0e1b10b21…

MALICIOUS

PDF

89.1 KB Created: 2021-04-06 16:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 470d257b0c45508642144e32cc806e20 SHA-1: d22af5fe074d76fe25de3c6683601ef2a806da24 SHA-256: 0df2a4e0e1b10b21a5a6cb25ffecaa3f26da37db598269ee4323926dd41eed1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. One prominent URL, 'https://dafemum.ru/wix?keyword=exorsus+raid+tools+notes', suggests a lure related to gaming tools to direct users to a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=exorsus+raid+tools+notes
    • https://cdn-cms.f-static.net/uploads/4417986/normal_605c6b3408996.pdf
    • http://eushopvmn.site/how_to_start_business_in_pakistanrdq2o.pdf
    • https://static.s123-cdn-static.com/uploads/4426966/normal_60029e3a91e1f.pdf
    • http://small-italy.space/nordictrack_exp1000i_reviewlimcu.pdf
    • https://static.s123-cdn-static.com/uploads/4487658/normal_5fdef6f8b80ea.pdf
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fd64448c638d.pdf
    • http://jirafka.space/risk_register_constructionyudad.pdf
    • http://foyou.store/what_is_the_new_heaven_and_earthft10u.pdf
    • http://icily.xyz/costos_de_no_calidad_definicion6l6k1.pdf
    • https://cdn-cms.f-static.net/uploads/4372105/normal_60324efd999da.pdf
    • http://fojibewuf.iblogger.org/joint_commission_report_a_complaint.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_bf979889bc0042ecbb5db71f324f9c70.pdf?index=true
    • https://s3.amazonaws.com/zeworibuzoza/bubble_level_tool_android_app.pdf
    • https://s3.amazonaws.com/fidefofudi/molomabukawasoxij.pdf
    • https://s3.amazonaws.com/rupatojuko/powerpoint_templates_progression.pdf
    • https://s3.amazonaws.com/kudowo/juz_amma_surahs_transliteration.pdf
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_528000529a79422c83b9982c7d7c26d2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a6329d67-5708-4937-8b9d-c79830671c71/57236013005.pdf
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_c94eb614b1734ce494373500bee9f1db.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b1949de1-7fa4-4fdf-bd09-e8a0c141efbf/nespresso_usa_machine_plan.pdf
    • https://uploads.strikinglycdn.com/files/2d7e59d0-434c-4759-920f-915652f254e1/ancient_greece_gods_and_goddesses_names_and_powers.pdf
    • https://uploads.strikinglycdn.com/files/e2c2e4d4-083f-4324-8f0a-2e04a018aa45/75123186878.pdf
    • https://s3.amazonaws.com/bejikefowu/retefipiwetibunupobuzeb.pdf
    • http://latarugumajovi.epizy.com/nazolizidakubuvo.pdf
    • https://uploads.strikinglycdn.com/files/a5a4532b-0925-4ee7-9e7f-291a02ccf76f/35715627930.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010005.bin
1f56ffe105f3dd9ab697dfccb3173c93275a1befc950a1f29cab733be2a0a4e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 4844 bytes
font_01_sfnt_off00011084.bin
f71a47484c95d7a8a65244bd51e38c405cd89f9b07b6a5ad15c9a573391ef875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11084 2052 bytes
font_02_sfnt_off0001193a.bin
1db8c694afcce1f17f5dea296876ce762c3d44806716430c8986acd9aec4aeab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 11128 bytes
font_03_sfnt_off00013f2d.bin
de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2D 16340 bytes

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