Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cab222fcf6d457…

MALICIOUS

PDF

94.2 KB Created: 2021-03-17 03:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4893ed63782b975cf0f0d8c64179272 SHA-1: bb503b2de8a0b82555f846b3ee2b554ecb7d8037 SHA-256: 37cab222fcf6d4573a6933c11f6459aabaa8eca6c6fc778f788d3bbf5a84374c
136 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating an advance-fee scam lure, specifically mentioning lottery/prize language and parcel delivery requirements. The embedded URL and numerous other URLs extracted from the document point to suspicious domains, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/award?keyword=university+calculus+early+transcendentals+3rd+edition+pdf+download
    • https://cdn-cms.f-static.net/uploads/4453103/normal_603b7c6ac757f.pdf
    • https://cdn-cms.f-static.net/uploads/4484806/normal_6034e98be91e7.pdf
    • http://reduslim-officialsite.site/typography_design_books_free_download5rkty.pdf
    • http://lebedugipul.mywebcommunity.org/84133772252.pdf
    • https://static.s123-cdn-static.com/uploads/4367656/normal_5fe1c37002c37.pdf
    • http://4gusevshop.website/lezusjabvf.pdf
    • http://reduslim-shop.website/house_lease_agreement_format_in_tamile6mbq.pdf
    • http://fadulifakibul.medianewsonline.com/psalm_23_4_meaning_rod_staff.pdf
    • http://housefashion.ru/how_to_backup_iphone_on_mac_catalina4d0qd.pdf
    • http://xenejesujotolud.mypressonline.com/43854886363.pdf
    • http://realwockyc.info/todoxam4uut.pdf
    • http://foramodosug.mygamesonline.org/75717279312.pdf
    • https://cdn-cms.f-static.net/uploads/4405638/normal_602ecbea6cb01.pdf
    • http://ninuxalezopo.getenjoyment.net/dd_planescape_campaign_setting.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sutexuvidag.myartsonline.com/what_qualifications_do_i_need_to_be_a_vet_assistant.pdf
    • http://zepuwiz.atwebpages.com/how_to_return_to_sender_post.pdf
    • http://xufoziminep.onlinewebshop.net/1719452888.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d9c.bin
7c13c0411ea80a9f769b1e1a1049d699871794f025a15ec956dbdfdb2992f819
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 5560 bytes
font_01_sfnt_off000140b8.bin
a417a8982d5952a9c928a29efe329fc563fef9aed9577749d1e7c8b57c0915ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x140B8 12456 bytes