Malicious PDF — malware analysis report

Static analysis result for SHA-256 611dce065f2973e8…

MALICIOUS

PDF

95.6 KB Created: 2021-04-06 19:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e17b8e81143785b594acfc240736dd6e SHA-1: 39f3608ba916950064650b8184925de34fdb4211 SHA-256: 611dce065f2973e822fbf4b1276108e0caa13e4bd171cf705af4f9ea69976027
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to PDF files hosted on Amazon S3, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://resalured.ru/wix?keyword=microwave+cavity+paint+amazon', is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=microwave+cavity+paint+amazon
    • https://static.s123-cdn-static.com/uploads/4424328/normal_6006b2153db87.pdf
    • http://alesyasemiletova.com/how_much_is_sandalwood_worthkj9ik.pdf
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5ff3a5e946033.pdf
    • http://tk-time.site/10_pin_bowling_arcadebtpc0.pdf
    • http://dikegebe.mygamesonline.org/beall_s_list_of_predatory_journals_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4419820/normal_602a49ef49ef3.pdf
    • http://tixokapine.mypressonline.com/does_walmart_carry_landline_phones.pdf
    • http://vuwiwetidajin.mywebcommunity.org/clasificacion_de_las_empresas_segun_su_tamao_peru.pdf
    • https://cdn-cms.f-static.net/uploads/4370525/normal_604a5b76a5d62.pdf
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/befabafuxob-kozoritez-dizazok.pdf
    • http://life50it.pro/61890418094698ed.pdf
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/zorapafof.pdf
    • http://static-start.top/21398127777yxowt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mutirexa/vavejuzapiseforixitaler.pdf
    • https://s3.amazonaws.com/mefadedosuw/pendyala_nageswara_rao_songs_free.pdf
    • http://metotosebofetu.epizy.com/who_is_the_boss_when_making_a_movie.pdf
    • https://s3.amazonaws.com/wofaxil/why_is_my_thermostat_display_blank.pdf
    • https://s3.amazonaws.com/mojivikapeti/what_is_human_error_in_science.pdf
    • http://guruwemuzotal.epizy.com/kafenoveketu.pdf
    • http://patuwovoparivi.rf.gd/mefiwelir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e8b.bin
0000997de044e6318ec820e99d7f54d4d97b61f3d5165384a28cc9b44315bf3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8B 5176 bytes
font_01_sfnt_off00013047.bin
e159c3b7d0bb79b8573e08d1d0ad54fdc9fe1f737c858c4b72362d0c6c8494df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13047 13040 bytes
font_02_sfnt_off00015b74.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B74 16164 bytes

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