Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eb6f09fb8904e6…

MALICIOUS

PDF

71.6 KB Created: 2021-03-24 11:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: de2c1af1ea45d1daab43f1bc8a78f685 SHA-1: 7087d2ababbcd418fc74cb9cac794a598033b1ee SHA-256: 02eb6f09fb8904e6dd4c9967908d2529c597a5a54f3ca3c0496fbb4263eeba61
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/award?keyword=the+practice+of+adaptive+leadership+pdf+download PDF link annotation
    • http://zepebuporume.iblogger.org/13672149991.pdfIn PDF document text
    • http://wobepatonogez.iblogger.org/47252698481.pdfIn PDF document text
    • http://zaxijejolegodur.iblogger.org/baova_ena.pdfIn PDF document text
    • http://tukameduk.22web.org/fonulozekujutiwujazaforuz.pdfIn PDF document text
    • http://vexasemigema.iblogger.org/argument_essay_template.pdfIn PDF document text
    • http://tiwirodizefa.iblogger.org/postnatal_depression_assessment_form.pdfIn PDF document text
    • https://zixijatujomalul.weebly.com/uploads/1/3/5/9/135962278/4003154.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/d5880.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/football_game_information_in_english_for_project.pdfIn PDF document text
    • http://pefezigeva.22web.org/dewobilorekowupewenase.pdfIn PDF document text
    • http://zutixononazetu.iblogger.org/cisco_sg300-10sfp_default_ip.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/f3ddba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc6fb43-77e3-4f44-abd5-cedfc55ff72f/vizio_sound_bar_2.1_v_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06469b6-05c0-4cd3-b71f-a26d1a7b219d/idiom_worksheets_for_esl_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/13575601345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51951f5-eda3-47b9-9e52-3bce1f7a8d2a/gidopijumaduriwagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffce89c-8527-41cd-a4f9-6388ba8ef1da/do_i_need_to_reset_thermostat_after_changing_batteries.pdfIn PDF document text
    • http://botodivezegi.rf.gd/tebumuxobuxed.pdfIn PDF document text
    • http://galapor.rf.gd/animation_series_in_tamil.pdfIn PDF document text
    • http://visapuma.rf.gd/company_tax_return_form_2008.pdfIn PDF document text
    • http://xabulupemoze.rf.gd/10706300352.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/10811383280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2e107d-334c-45d8-9fac-aa821d4b859b/mossberg_500_forend_strap_install.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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 5344 bytes
SHA-256: d61cca8db5b7c9bea515f81a14d4dea0a23784e148bfe2f11532762b5b73f91c
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10352 bytes
SHA-256: cacd03c2525fadaacf3484732db225a906a1b62da4beb1f3df33aa6a7440fc34