Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a3e7212ebfa530…

MALICIOUS

PDF

74.3 KB Created: 2021-04-05 09:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c04cddd7426f961850bbb22bbe32fd88 SHA-1: e66204bc7c0b64588ef107bf352c943abd06a73b SHA-256: 90a3e7212ebfa530c089de88df2d7e781f275f05db104d5133147ba362d23e13
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to search queries, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links strongly suggests the document's purpose is to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/aws?utm_term=how+much+does+marriage+counseling+cost+in+south+africa In PDF document text
    • http://jamidufabe.iblogger.org/jiperaturozixiterepijupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fecf1795a231.pdfIn PDF document text
    • https://wezawemexa.weebly.com/uploads/1/3/1/4/131410399/votipetutupuluda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_60659cf8b63fe.pdfIn PDF document text
    • http://cardioactiveufficiale.site/what_skills_are_required_for_managers3pu7i.pdfIn PDF document text
    • http://alsamcctv.com/what_kind_of_oil_for_2017_chrysler_pacificanbxg7.pdfIn PDF document text
    • http://kpupnov.pro/polygons_and_angles_worksheet_answers_with_workwi541.pdfIn PDF document text
    • http://chambreapp.xyz/best_way_to_do_process_flow_charts_in_excel8ww48.pdfIn PDF document text
    • http://giftcard-sale.store/xenobiotics_notesa9nlz.pdfIn PDF document text
    • https://viwitilabepimep.weebly.com/uploads/1/3/2/6/132695477/gusarawum.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/4cb8d9f.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/duwatisep-xuxitus-bikav-biferemem.pdfIn PDF document text
    • https://bedasalisavif.weebly.com/uploads/1/3/4/6/134601990/8094181.pdfIn PDF document text
    • http://teachost.com/fikawo5awfd.pdfIn PDF document text
    • http://santaparker.store/what_do_cogat_test_scores_mean53r0u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_60657b1a561cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesobuze.epizy.com/kuliwoxafelixufu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/gifororiropevob.pdfIn PDF document text
    • http://sujidise.epizy.com/87085685572.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/xitemofadexi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5488 bytes
SHA-256: d0a5cbaa37b8aa255883e5b63966fcc4f32245c23597af700b457496ce4be1ea
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 10880 bytes
SHA-256: f047ce8aa9216092495f810f8fed57952bdd903a639be13b27ef738c984c4dc0

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