Malicious PDF — malware analysis report

Static analysis result for SHA-256 19aa0875eae89005…

MALICIOUS

PDF

82.2 KB Created: 2021-02-14 16:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e92e6430a2ab43ce1fdcbfd5f7b9bff9 SHA-1: 340d731a730a8ca8efa41434fe4405428137622c SHA-256: 19aa0875eae890058c3b0287dbccab5c60c6d7ab65ef52189dad12c5e02cfd99
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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 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.
  • 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/123?utm_term=car+seat+cooler In PDF document text
    • http://vitalia-transports.com/13261397911ntam3.pdfIn PDF document text
    • http://topcreditscore.info/96036452569xt7r3.pdfIn PDF document text
    • http://docita.fun/zateposetreb0.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/jePw4ib/65301004174.pdfIn PDF document text
    • http://intereriia.com/choy_lee_fut_full_movie0t9ac.pdfIn PDF document text
    • http://hookup153.fun/nafebexadupifudonubakaqej.pdfIn PDF document text
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/4009085.pdfIn PDF document text
    • http://yoga-italy.space/37841944918zkiqf.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/hhpY8jb/65995411773.pdfIn PDF document text
    • http://online-bestshop.xyz/becker_usmle_step_1_books_freew5eij.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/jqibias/vowalevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/pirekegudevokigoditanop.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/43714510512.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/ebmt_2019_poster_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/practice_worksheet_evaluating_logarithms_key.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/colonel_bogey_march_sheet_music_free.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_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 4700 bytes
SHA-256: 960575da0bde62ee25692f6d3fd359126f26bbd13e4c296bf97a6e3eb4a30d74
font_01_sfnt_off0001169c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169C 10980 bytes
SHA-256: 9d74f0690ebd618425291e07a74576ed91564be3dd989bda910a452fb7f18528

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