Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e214d1a53b03d50…

MALICIOUS

PDF

74.2 KB Created: 2021-03-28 18:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 51086fd23fb1a3066131dfab3a5b4505 SHA-1: 0885ab5a39561a1e35860bfff03b45154a95ce67 SHA-256: 4e214d1a53b03d50f021b8f191c857c3b2f5202a47b60c85e54547be393d8f81
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://mezovuduw.ru/award?keyword=butterfly+valve+types+pdf PDF link annotation
    • http://cardio-natural.info/what_is_the_barn_burning_abouti88or.pdfIn PDF document text
    • http://usesoda.pro/hayward_pool_heater_error_codes_ifqy3od.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fcf2dc3195db.pdfIn PDF document text
    • http://zozuwax.66ghz.com/62386808851.pdfIn PDF document text
    • http://respect-ltd.su/bridal_mehndi_design_video_mp47w495.pdfIn PDF document text
    • http://reduslim-officialsite.site/nadoxezagoymljx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5ff64ca029826.pdfIn PDF document text
    • http://b2b-servis.ru/34454608589ilftb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467298/normal_6000e8e5a1aff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisogifamesada.epizy.com/android_box_play_games.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/rewuvobem.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_5f20830f5cbe4c4b9b17ef64656d7b7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/mevorapijumitujowuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a19c47c-bac8-4e0b-af42-1a6b494dff47/xejakonan.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/14884685261.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_a264c78cb38442968f33c623d8e4d955.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumuzu/terapia_cognitivo-conductual_para_tratar_la_ansiedad.pdfIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_26a65c5a04604c2da20d5b8cbca9749b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8296ea-5f32-43e1-bde0-def572057cc3/how_to_make_a_12v_50ah_lithium_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/gexodoziluwepelaj.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_f6acc2f2e3bc4adbbe0dac4c407136e9.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_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 5244 bytes
SHA-256: f83487fd8aca7bf9b20d8fa3a0e7df1ea2b892c501b5e75887aa34815e126ccf
font_01_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 10520 bytes
SHA-256: 662a4f1612d17dd7dfcde907e18170254e10f83a74e525e89e01141319f45675

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