Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e66ebdd5642933…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 19:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d4ab761a8eff6aad19fb5b23c0935e30 SHA-1: 2bfbfe898b6df5cb923b3e6ada9a036d6163b32b SHA-256: 89e66ebdd5642933e15e4895a8af91091c51892f091e671814c428ccff9b98f8
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text about dental crown costs. This indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious infrastructure.

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://yafferge.ru/strik?utm_term=how+much+does+a+replacement+tooth+crown+cost In PDF document text
    • http://xabotijal.iblogger.org/ground_sheet_b_m.pdfIn PDF document text
    • http://pefipegukanijel.22web.org/8374562247.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/temuruloxofoxinumatupeve.pdfIn PDF document text
    • http://daduriwikoniza.22web.org/dear_life_alice_munro_free.pdfIn PDF document text
    • http://naykaryadom.fun/net_speed_limiter_for_androidna2o1.pdfIn PDF document text
    • http://gikisivota.iblogger.org/presentation_cover_design_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokagozu.rf.gd/70443971930.pdfIn PDF document text
    • http://musovulazapa.epizy.com/gcf_and_lcm_practice_worksheet_answer_key.pdfIn PDF document text
    • http://wuwovedivaz.rf.gd/movies_hd_apk_2019.pdfIn PDF document text
    • http://julopok.epizy.com/64836743811.pdfIn PDF document text
    • http://ladipuxot.rf.gd/verathon_bladder_scanner_user_manual.pdfIn PDF document text
    • http://diwukimip.epizy.com/indicative_term_sheet_meaning.pdfIn PDF document text
    • http://fegesizonavuvu.epizy.com/carpinteiro_pregador_playback.pdfIn PDF document text
    • http://lokedexipexeles.rf.gd/bosch_automotive_handbook_9th_edition.pdfIn PDF document text
    • http://derekage.epizy.com/53839956173.pdfIn PDF document text
    • http://rejefuwozumij.rf.gd/pigegajofegusagula.pdfIn PDF document text
    • http://rexawisoza.epizy.com/line_dance_step_sheet_absolutely.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_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 5368 bytes
SHA-256: e252246fbb430832cd23e08f88244abee75a2db3b778f8d7f1f13a5dd19b6348
font_01_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 10684 bytes
SHA-256: 234878b757be9a47ffdf2e69363c771e05278522bb6ed4963dee24fa6a71adb4

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