Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae2046b67882b3c…

MALICIOUS

PDF

73.8 KB Created: 2021-02-18 09:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b8262945977127eda7c01b3d20c6db71 SHA-1: d1deeafccf85a8a405d0d0a36a35f5b1587a9776 SHA-256: 5ae2046b67882b3c4c3b3a74f6fe126a68e2b6ed3a9382f4fbd9235c6e363a58
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are indicative of a link farm. The primary URL, 'https://baarspo.ru/wix?keyword=come+set+your+rule+and+reign+sheet+music', suggests a lure related to sheet music. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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/wix?keyword=come+set+your+rule+and+reign+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459059/normal_5ffaa1979d7c1.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/ramuludexuk.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/3d8d99a3a59cbd6.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/fixunenadezufadalaxow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fed0e0a5f24f.pdfIn PDF document text
    • http://vixurefivero.66ghz.com/tungsten_bold_font_free_ttf.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/6d6f7ac8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419633/normal_5fee6181d9d35.pdfIn PDF document text
    • https://luboguti.weebly.com/uploads/1/3/0/7/130739177/sutip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sofidubanelen.epizy.com/divergent_book_report_powerpoint.pdfIn PDF document text
    • http://zapesuxeliribi.rf.gd/3_digit_addition_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/android_studio_ext._kotlin_version.pdfIn PDF document text
    • http://ragasusivoreta.epizy.com/37948914663.pdfIn PDF document text
    • http://xepujeroniwazip.epizy.com/greeting_card_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/cricket_19_crack_only.pdfIn PDF document text
    • http://porumujowupof.epizy.com/bartholin_cyst_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/luwewalaxixe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 5360 bytes
SHA-256: edf1826a8e084372d4dd32bd0ab74d82b960e802b061a704af20fa6535686c7a
font_01_sfnt_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 10472 bytes
SHA-256: 33fd006d3d8505feb5e240cf739bac469990df1c1743ff676fcf6bd5b622a237
font_02_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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