Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6b272bb0545f84…

MALICIOUS

PDF

83.6 KB Created: 2021-02-23 02:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43c455388f05423d9b7a910c5c1d249 SHA-1: c8c6900bcb22c02c7dab7b101c94cdac7aac05eb SHA-256: db6b272bb0545f849d9e858d1324257fc4ed6c5bf5ac790bec9acd3365ec4738
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=sd+maid+pro+full+apk+2020
    • https://cdn.sqhk.co/mawejoxejobe/jabmihg/fizexaxoxujipoxo.pdf
    • http://discovljzg.fun/british_council_phonemic_chartw8tm1.pdf
    • https://cdn.sqhk.co/molodomo/37Rifgh/black_friday_deals_2019_home_depot_appliances.pdf
    • https://cdn.sqhk.co/zewuxumaro/gpjhajd/37123598864.pdf
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/tuganukodakope_famovagojelu_bedatarabid_fipixe.pdf
    • http://medtechnika1.ru/what_type_of_oil_goes_in_a_hydrostatic_transmissiono7332.pdf
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/5142960.pdf
    • http://whitetwo.space/3050970482zols1.pdf
    • https://cdn.sqhk.co/jiguluzufuwa/hbjaMid/98896009386.pdf
    • http://musc-media.xyz/97678956191nd635.pdf
    • https://cdn.sqhk.co/zikonidenijo/gfhjahc/telehealth_nursing_jobs_ny.pdf
    • https://cdn.sqhk.co/gewigerajoru/SBDhdKw/jepilodovapuz.pdf
    • https://cdn.sqhk.co/zumedizojas/aKrhgll/beautiful_hd_wallpaper_for_mobile_phone.pdf
    • https://cdn.sqhk.co/givifevulo/thaHhdM/zuzerumavo.pdf
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/210418.pdf
    • https://cdn.sqhk.co/zapiseniw/hcgiHLx/yellow_book_cover_background_hd.pdf
    • https://cdn-cms.f-static.net/uploads/4485434/normal_601a46220757e.pdf
    • https://cdn.sqhk.co/bawusipa/ghgf49S/affirmations_for_self_love_cards.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc1.bin
4460e8012c43741ca1b006b380e66f1876597d6f5f2888e3c0f74724e4808a30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 5028 bytes
font_01_sfnt_off0000eec1.bin
0e0d8dd5fa691c094b48e8b5f0ccdd47a9bdd2c5f4b230a5db6e59b1d82e6bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 2236 bytes
font_02_sfnt_off0000f8f0.bin
58b6c2a2cbfb52bf950b1179a81384eccdac08d43a0c1287262f556370ac22cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 10192 bytes
font_03_sfnt_off00011c07.bin
50ddbf90fd23f216915f5a63b0bf4091c8ad0debefa1b6da82dbca21ab18609e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 16672 bytes
font_04_sfnt_off0001326d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 4324 bytes

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