Malicious PDF — malware analysis report

Static analysis result for SHA-256 e743cec777e1e2f0…

MALICIOUS

PDF

80.2 KB Created: 2021-03-04 14:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 61e3b7f510f3840989ab4394eaf3f9e9 SHA-1: aa520fd1bee9a7675618f84b8ae4abe60cab2d36 SHA-256: e743cec777e1e2f084b526459162b5c9edc4c5caaa6a8d8aa4b6bada0611844d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content. The document body, though partially corrupted, suggests a lure related to search results, specifically mentioning 'Favorite lord of the rings book reddit'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=favorite+lord+of+the+rings+book+reddit PDF link annotation
    • http://choosemadam.site/plane_simulator_3d_mod_apk_happymod6fh20.pdfIn PDF document text
    • http://help-bluebadgecenter.com/how_to_reset_a_rca_converter_boxzjj8f.pdfIn PDF document text
    • http://alteramaks.world/mexegasarevowodironoriby7nh3.pdfIn PDF document text
    • http://kompledom.com/how.many_carbs_in_lettuceoyp20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_601ac854be1c3.pdfIn PDF document text
    • http://littlenat.space/zoxavosuwibeti04kyw.pdfIn PDF document text
    • http://lighterusb24.site/coca_cola_annual_report_20149legw.pdfIn PDF document text
    • http://titoto.xyz/86256090434m01s7.pdfIn PDF document text
    • http://infonewsuk.site/giraropelatixikapaoqcom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fd78c6bf0416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_600df09d3d2ee.pdfIn PDF document text
    • http://whitetwo.space/165620150403e04x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413005/normal_5fee008222bee.pdfIn PDF document text
    • http://shimano-stradic.ru/203210440486lbms.pdfIn PDF document text
    • http://gatorama.fun/linus_and_lucy_sheet_music_piano_free8nrzf.pdfIn PDF document text
    • http://daravto18.ru/how_to_obtain_your_private_investigator_license_in_floridadpryc.pdfIn PDF document text
    • http://organicnu.info/jipibesusijuperasasipubux72k30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_220a03095ce040f492743ec505e1c276.pdf?index=trueIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_65cbf0fba04e45138985b9a21a146893.pdf?index=trueIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_1724379159b2456fa29f16156315c6c5.pdf?index=trueIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_243235e8fe6a451eb08d591246029f52.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_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 5388 bytes
SHA-256: 4cc12b4bcd9383fd561037225e4fbc0001c2f38f59e26a2ef5073e80f49998d6
font_01_sfnt_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 10832 bytes
SHA-256: 4d9518c3d1289d5400f9848d71f1ea195406337a600ffcbe8ac73fb181fc64a5

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