Malicious PDF — malware analysis report

Static analysis result for SHA-256 4087961bdbbd8379…

MALICIOUS

PDF

83.7 KB Created: 2020-11-26 16:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: babcdb52ffae4c85ca6b2142b53a2781 SHA-1: d2faf9831547a80470c88640c30417599a0e19c2 SHA-256: 4087961bdbbd83792b5e53ea40514915d7bf82fa6a1edde066e9bbfac83cbe5d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/strik?utm_term=is+mg%2528oh%25292+aqueous+or+solid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9039736101e.pdfIn PDF document text
    • https://kutolimog.weebly.com/uploads/1/3/4/4/134435461/renonoforefifad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f94abc1f0316.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/larurozinuko-jasiwopima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/2388429861.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/jokofaperur.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/watch_hunger_games_catching_fire_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/5850092419.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/diagram_of_lower_body_muscles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52952955-0bfe-43be-929b-d031db1025b5/les_fleuves_de_france_cm1_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072d1370-cfa7-4dcb-b62c-65c3ad246914/70632732959.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/fejibasazebuwusekizav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a89dc6-22f2-4369-990b-cb13a1079259/pawozesobe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 6492 bytes
SHA-256: cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73
font_01_sfnt_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 5588 bytes
SHA-256: 38d6bb75eda47072b6f8f592d3519f321ae1a5e20d9b1187b3730c1652b12751
font_02_sfnt_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 12144 bytes
SHA-256: 85459f1b8cc84df77fab43a64ce97934fae848dcd7ecb29f9c511be628880f71
font_03_sfnt_off00012c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16080 bytes
SHA-256: 3d50f22d3ae6d9a4461c814f81554cc573a3512c555c2f223aedeeaca19cd658

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