Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7c08e8f80eebef…

MALICIOUS

PDF

84.7 KB Created: 2021-04-11 04:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 57c815c6c76c4c1f44f301dbffc2d0c3 SHA-1: 71e9e04e8d7b7b05295ef6b4d7349fa8ae2d4f33 SHA-256: ee7c08e8f80eebef23a02b3a89d3d5749cf2a52812a454a4037c31e2ff539f60
126 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=what+is+the+gospel+quotes PDF link annotation
    • http://meine-gebuhrenfrei.com/muzutthsx2.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/ahuja_250w_amplifier_circuit_diagram.pdfIn PDF document text
    • http://about-central.com/sample_speaking_topics_for_toefl_ibt_with_answersav0zx.pdfIn PDF document text
    • http://neletaparufo.scienceontheweb.net/tsc_promotion_appraisal_form.pdfIn PDF document text
    • http://acupofjacob.com/towusipekefib21oi.pdfIn PDF document text
    • http://kapabifidi.sportsontheweb.net/anatomia_de_amigdalas_y_adenoides.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/why_is_my_samsung_refrigerator_not_freezing.pdfIn PDF document text
    • http://eu-study.ru/jopegutiwujutidkr7i.pdfIn PDF document text
    • http://stassikorskyi.com/67296044455y4mw2.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/o_alquimista_paulo_coelho_download.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/2757656935.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/jersey_city_public_schools_pay_schedule.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/dunubikuzu.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/lazizejimosiraledabexim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zipulosi.atwebpages.com/74879978841.pdfIn PDF document text
    • http://waxuvab.epizy.com/balanced_scorecard_strategy_for_dummies._download.pdfIn PDF document text
    • http://durapufagumupo.rf.gd/bunojujotuwiwaj.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/ba_llb_1st_year_books.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_2d8ae132c9394ebc806ae37767fa824e.pdf?index=trueIn PDF document text
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_d6243d507c3c45899a8773f396a5e293.pdf?index=trueIn PDF document text
    • http://kepawomokatuke.myartsonline.com/kerawafefekivijapizife.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/dd-wrt_repeater_mode_not_available.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/kinomavalopunuz.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/appraisal_letter_format_for_employer.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_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 5124 bytes
SHA-256: 6d5bfb1764c6025f7946b5c3287f5fde19388640184ea3efe7ac216d54626704
font_01_sfnt_off00011f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 10816 bytes
SHA-256: c9c05ef535e9b202667174518815bfafcb776bedb5edefff64336af8f863ad8b

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