Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0b1d764797aa51…

MALICIOUS

PDF

83.8 KB Created: 2021-03-27 15:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 73650e9f2bcaa45fdca105e795d0ca38 SHA-1: ed96058801ff5d85df8ba597951906e58dadd401 SHA-256: ee0b1d764797aa512d8e3128ffe6529ece755e14fd0ebad16f4193893260cec8
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary URL pointing to a site that appears to be a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the classification as a link farm suggest an attempt to redirect users to malicious content.

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
  • 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.
  • 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://jottigo.ru/wix?keyword=10.1+graphing+sine+and+cosine+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462697/normal_601f6921c917d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_60253542a9524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_602d439d34e8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404741/normal_5fdd6b04bcd94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fcdb2210b760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392869/normal_6003ea1f5e6fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_5fdff7068275d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_604d1e4be6c08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405467/normal_60038936b3a44.pdfIn PDF document text
    • http://wipegivo.22web.org/what_are_the_rules_for_three_handed_cribbage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_602e27bc880d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443801/normal_5ff2a2927178a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawuguv.epizy.com/how_to_open_viewer_in_jio_phone.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_a63bdefb83ea4ad4a1647bd9e71d656c.pdf?index=trueIn PDF document text
    • http://xizevobawilu.epizy.com/blender_deform_plane.pdfIn PDF document text
    • http://rapodipowunifo.epizy.com/88864389640.pdfIn PDF document text
    • http://duxitupogewaxu.rf.gd/how_to_replace_batteries_on_first_alert_smoke_detector.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_b32618e9751a4f4e80b81666da7d7afd.pdf?index=trueIn 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_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 4460 bytes
SHA-256: 9cd7ca09cfb717a2d54eca69e55fe64db015042b030fa716194b0d852b2554f5
font_01_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 5592 bytes
SHA-256: 22212fcf77fa68602f6000f2901f708a00c1041f9a08c1919e464adbc2a53c01
font_02_sfnt_off00011ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 10988 bytes
SHA-256: 8ed6f8498048329b4a22913f117d14e8047465f943a597cbd0558bb02d4649af

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