Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6805b06f1129971…

MALICIOUS

PDF

93.9 KB Created: 2021-03-25 14:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a27bd4dbe1de2a121f9df5e2ae959e5 SHA-1: b313d94bdb9c54c391a2981c5d1b2761d5c083fe SHA-256: f6805b06f1129971fa44bc70c69b617bd36d8d2c9ff0937df225a5648d5dc60f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URIs, with one specifically pointing to a URL that appears to be a lure for users interested in Excel formulas, likely a phishing pretext. The presence of numerous external URLs suggests an attempt to redirect the user to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=excel+formula+working+after+save
    • http://kerutugizuxig.mygamesonline.org/sewetipakadevosibumategi.pdf
    • http://nupesupo.mypressonline.com/96531252520.pdf
    • http://bagawixaj.mywebcommunity.org/delazesefusetugodizaluz.pdf
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/bitiwex_zupikusexez_sirexulunizunu_lugazel.pdf
    • http://niburufajanuto.sportsontheweb.net/joint_commission_international_accreditation_standards_for_hospitals_5th_edition.pdf
    • https://goginaderexikez.weebly.com/uploads/1/3/5/3/135306094/4872333.pdf
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/9727649.pdf
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5fce71c856ccd.pdf
    • http://game-pro.xyz/243575238156xmzd.pdf
    • https://cdn-cms.f-static.net/uploads/4413454/normal_602266df6c181.pdf
    • http://bandalet.club/how_to_find_log_on_ti-36x_pro6oydc.pdf
    • https://cdn-cms.f-static.net/uploads/4404529/normal_6042e566b90a5.pdf
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5fe1b0b4d28cd.pdf
    • http://instahelpforbusiness.com/short_blog_template_aminoqigfw.pdf
    • https://cdn.sqhk.co/jagibuvat/xifblRM/ant_killer_powder_indoor.pdf
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/641c1f8f.pdf
    • http://prequester.online/460964142703lsdg.pdf
    • https://cdn.sqhk.co/fedefuxu/ieheOhb/vaxevikasajifeva.pdf
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fe4236d6172d.pdf
    • http://minesaxofunawi.getenjoyment.net/cyberpunk_2077_ps4_controller_issues.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_4c1da459be3041429e1c2ea14b3d9915.pdf?index=true
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_1940064f30d7426eaffbf48d9c83e178.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d62.bin
d7b01073dbb89abaf34a4fab053e573f4ff649777f6a90da1aa861a48c53bb44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D62 5444 bytes
font_01_sfnt_off00013ff3.bin
5adee35d2baa9157db1c5745bdd1474bee02dac7c14424a7c98ed29580d39e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF3 12308 bytes

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