Malicious PDF — malware analysis report

Static analysis result for SHA-256 22170725fcf59708…

MALICIOUS

PDF

78.6 KB Created: 2021-02-14 23:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1dbd02f04e458fffabdd62b9a6331c38 SHA-1: 46498fbbc561cf32261d3bb33fe93f3b5b71f3b1 SHA-256: 22170725fcf5970826bf8aaa2a929e063ec3d1760a58d201618c91febe2ad085
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics indicating it functions as a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack pattern involves luring users through a document that ultimately redirects them to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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/wix?keyword=triangle+area+perimeter+worksheet In PDF document text
    • http://vseti.life/952152451388etyx.pdfIn PDF document text
    • http://copyright-central-media.com/234332072742sq2b.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/aidXfad/kupebigivosagoba.pdfIn PDF document text
    • http://my-credit.info/706283202597hzlp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff6643edc6c1.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/hjR58q6/sprint_international_calling_and_data_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/eNgwifE/download_drag_racing_3d_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_601073592346d.pdfIn PDF document text
    • http://winsbig.space/63612106114xp2lm.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/pkhj7hi/2016_can_am_defender_dps_hd10_top_speed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419637/normal_5ff8997b51482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_60145d4462a6a.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/nisoxow/bikidabuxizozasesejonobep.pdfIn PDF document text
    • http://sebukojuteropib.rf.gd/xavijaxopimubas.pdfIn PDF document text
    • http://koxosam.rf.gd/cad_2010_keygen_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/44863402758.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/lagu_pendayung_patah.pdfIn PDF document text
    • http://rawibejib.epizy.com/pdf_accessibility_checker_tool.pdfIn PDF document text
    • http://ramejepazino.rf.gd/moltiplicatori_catastali_2017.pdfIn PDF document text
    • http://tofaveme.epizy.com/fordlandia_reading_answer_key.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 5340 bytes
SHA-256: bb57eb3463b3b70e7a505ffd943a70467a4df92369c1acb0889afe50415982cb
font_01_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 10160 bytes
SHA-256: b39a29d88c061b26748c029e5be3a3da11f71ced9a13d15612ad1f5217b20283
font_02_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 16196 bytes
SHA-256: 26d35e1383085e9cb9d4d21dc57af34f690a59e5e018f3061624371f6fe277e7

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