Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c39be605453bdcc…

MALICIOUS

PDF

79.3 KB Created: 2021-03-29 19:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4e063dc2186863343ce646130bee79e3 SHA-1: 22e79b0144b952a0d851ebadc4f726613c5499f8 SHA-256: 2c39be605453bdcc48da705bbda7da423737c706121df8288327dd1e21a24b95
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=catalogos+digitales+andrea+2020+pdf In PDF document text
    • https://cdn.sqhk.co/xikokopek/icTiahc/bagutametolezogegesen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_60287141807b6.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/appsc_group_1_draft_syllabus.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/6002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_604895ae204e0.pdfIn PDF document text
    • https://nuvefiwepopowu.weebly.com/uploads/1/3/4/5/134502743/7088336.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/xuzivevafibab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_603304fdda7bd.pdfIn PDF document text
    • https://bolomomotune.weebly.com/uploads/1/3/4/7/134762543/liretudobokuxuget.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/ggsI79e/tamil_comedy_video_whatsapp_status_free_download.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/marlin_336_serial_number_starting_with_mr.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/becoming_a_professional_life_coach_free.pdfIn PDF document text
    • http://gojoges.iblogger.org/gofelar.pdfIn PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/5319132.pdfIn PDF document text
    • https://cdn.sqhk.co/kagawupatow/pjdicgV/10950245419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_a4652191bbdd47dcbd0a54ad948318b5.pdf?index=trueIn PDF document text
    • http://kavibajegis.onlinewebshop.net/soxarotilog.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_e3f1fc827f754cab926883dd800d0aaa.pdf?index=trueIn PDF document text
    • http://lotarikavim.rf.gd/bamapesewodul.pdfIn PDF document text
    • http://malejubu.myartsonline.com/86948390400.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_934b00e4de484df1b6cdc1b4e2075fbc.pdf?index=trueIn PDF document text
    • http://vipojidetag.epizy.com/ayyappa_swamy_patalu_telugu_naa_songs.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 5296 bytes
SHA-256: 2b098a1648d78ecf138218da7bdec5e1560c3709348f4309627333a402e99ca2
font_01_sfnt_off0000fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE1 10948 bytes
SHA-256: 22c72e7cf3d25f200d9786668f06fd156dcbdf4ab2548f70b009440110bae80e
font_02_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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