Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e89f95ef7bdd15…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 15:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6f8fe1df51476bb24ba0553d2563c017 SHA-1: 8ec3d6df0a19d1f102fb194888d5a5023e50f2b5 SHA-256: 26e89f95ef7bdd156f959fd2f20bc5e79bc6d30952523511151d6319e9f65245
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document exhibits characteristics of a callback phishing or tech-support scam by luring the user to call a phone number. While no scripts were explicitly extracted, the presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites or initiate fraudulent calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=north+ridge+elementary+lubbock+tx PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fe387441e7aa.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/forms_of_e_commerce.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/75187231078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_601393570761f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_605540bd59ea0.pdfIn PDF document text
    • http://xejeboge.22web.org/brother_dcp-_t300_driver_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_600a5a52d71d0.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
    • http://suginuzebaluwom.rf.gd/93643081199.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/pomifut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7463942f-65e4-4cac-83f6-1b0ddb519106/xatarazuroxaxupeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668d8a4d-674c-43b9-9372-491cb818bcb3/97363908638.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/56824916701.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/bit_web_server_apk_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06ed11b-a797-4104-b0d8-20c44419e12b/how_to_say_yes_please_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72d3ffc-1991-4bd4-b38a-adfb89d06cb8/kivefimakasixewegaduviziv.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/43793526771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d9bcc5-fc7e-47c0-92b0-d52a705aa75b/xidoxesegidikik.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/90095812782.pdfIn PDF document text
    • http://majilutiwuxas.rf.gd/its_kind_of_a_funny_story_trailer_deutsch.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/jovos.pdfIn PDF document text
    • http://kapupexuninub.epizy.com/87852425337.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_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 5400 bytes
SHA-256: 62cd53470683693dc18b9b92246a014cb8a4c13e16f59ad83396e3560913edf4
font_01_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 11004 bytes
SHA-256: 60b5d345e58ccc14005b0f6e4f4c15f1b4a6430dec8cb6c60fd8b415d6dcbee1
font_02_sfnt_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3