Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1180b3398d7e7e…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 23:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 09e86ed62b6835573cbee0f813946d82 SHA-1: 0939ea78ce1a49de2ed43b73015f97d1be0f32f8 SHA-256: 9f1180b3398d7e7ea457b3a4fca3bb0299bbb59137a64ae06d7b3f7be5ed6c0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful sites. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://queure.ru/uplcv?utm_term=mobdro+ios+11 PDF link annotation
    • http://servmed.net/userfiles/file/totaranusilupuvipokal.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/93632948032.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/446fde10f22c1717a787be10797c341f/muzekubibiwi.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/24129149272.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/59481703349.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/96289496896.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/49112919903.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbfcd9fffe---zuneroj.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/21823028836.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/9200063333.pdfIn PDF document text
    • http://jyy.jp/ckfinder/userfiles/files/20210918_201134.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/62220462244.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/felawenejaludej.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/17009766488.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/lugogefonebasajegonuf.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/vefapalojosedak.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/puzalelikexumetixegaraze.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/21617420665.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/75462701974.pdfIn PDF document text
    • http://zzquansu.cn/d/files/30546201914.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/kojisubemozukenowapodemed.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/20564220668.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC89 9884 bytes
SHA-256: 33257ea1872bbd2a0c6dc5f80e9abc2573f01c1e199d1112c723ab003146dae1
font_01_sfnt_off0000c25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 15904 bytes
SHA-256: 16332b81bc26dafe7bc34355d395d8d97ea830e20b6e32688c8fc8245c88d9ad
font_02_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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