Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f19c8646d9fe5e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-05 07:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3cc5841917ac5dd8996c03ea75b9ad07 SHA-1: 2c9655952957d543aee00303cdbb37abc8474b52 SHA-256: 15f19c8646d9fe5e760420ea38379eb5b55b3930f6c4f8e6eebf864ad64c01c3
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though truncated, suggests a lure related to financial charts, which is likely a pretext to drive users to malicious sites like the identified redirector.

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
  • 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/strik?utm_term=how+to+read+candlestick+charts+thinkorswim In PDF document text
    • http://relibafogat.sportsontheweb.net/didukezaludubogiramexofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_6038c8ad2114a.pdfIn PDF document text
    • http://jujigosobo.iblogger.org/android_tv_launcher_port.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/heil_furnace_unit_age.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/webasto_bunk_heater_repair.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/boatswains_mate_salary_australian_navy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fe5a833b7608.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/proform_xp_crosswalk_580_treadmill_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_ecd18d03c5f24800bc1af31f261c656c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/86456810065.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/3389114661.pdfIn PDF document text
    • http://benamow.myartsonline.com/paxusopojanika.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/bahubali_kannada_movie_songs_free.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_bc43e105fc69488d9031e5e7ed6628db.pdf?index=trueIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_3b39ad86db4c439aa68f88dbb0b46971.pdf?index=trueIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_b279d1a654314062a4a7a7f16d805b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roware/azar_modded_apk_3._5._6.pdfIn PDF document text
    • http://watibanawik.epizy.com/animal_embryogenesis.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/fundraiser_donation_request_letter_template.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_13c10dac35dc4a8eb07397ad82c1628a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5296 bytes
SHA-256: 067d643df2ec3de9e025bdd572b146b5332b9c071b2b89e4ff01bd6d5d238436
font_01_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 11120 bytes
SHA-256: 9611752a782e49306b55321fe5bfc352e8738b266da481d9576e639ea36c8934

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