Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f7a29a1e274ee3…

MALICIOUS

PDF

79.4 KB Created: 2021-02-25 23:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d1b909806326aad0d98190b3e5e14b39 SHA-1: aadc2468b9caaeb641877e49a743789374b73f14 SHA-256: 25f7a29a1e274ee3664f3f2f718aed34c641874f7f0e1886c557b0db3868a335
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect the user to a phishing or malware distribution site, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=elimination+word+problems+worksheet PDF link annotation
    • http://henrysavbr.site/how_to_use_farberware_stovetop_pressure_cookers23uv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_6016c4e980868.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jbhgeqb/best_music_ringtones_2017.pdfIn PDF document text
    • http://ductsunlimitedins.com/vajiteposevjt88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_5fe71676839ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_603196be6e8c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5ff552e6adcb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499005/normal_5fe06c2f985a7.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/ppicbss/tanoxuzisiwexuverido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_6018a685e208e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/embroidery_stitches_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/33576636016.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/pewirivugatexoz.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/mysql_community_server_for_mac.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 5452 bytes
SHA-256: 30029444e617bcdcad5f59cef866460fc7fa5030f2ec479d5f2de2eb74d6e859
font_01_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 6124 bytes
SHA-256: 18e31adb0d8af36e2f05080583122a4ebdb11b7691687cca8a4bee432085d0aa
font_02_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 10568 bytes
SHA-256: 97eeb722e04d498971ee12736c5ef57643bf32e5fc3f07fa0ddf77931598205b

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