Malicious PDF — malware analysis report

Static analysis result for SHA-256 68009a7aa1e6875b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 00:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d39dcc940840ac465b4fda046ff45216 SHA-1: 468952ab0926602161b3d3531bd68690b0abeb92 SHA-256: 68009a7aa1e6875b274be1da743d10764f2c83090eb668d30d12435f0f260c71
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'essential oil books', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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 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.
  • 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://dafemum.ru/strik?utm_term=what+is+the+best+essential+oil+book+for+beginners In PDF document text
    • http://megazoni.iblogger.org/2018_animations_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5ff64d99e6317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fd3a8b696fe5.pdfIn PDF document text
    • https://cdn.sqhk.co/nakolore/hzhjfl7/duzekawiwuru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fd04fd4bb5b1.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hiBhiK5/meguwikojijotoxigoxujunij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6043092a0e3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_604fcaa79d848.pdfIn PDF document text
    • http://pigopivelar.iblogger.org/kesine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_603777f65d5c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_600ff767d2823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459170/normal_5ff587ae16bdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382003/normal_5fee550a95897.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
    • https://s3.amazonaws.com/zesotat/integrated_chinese_1_textbook_simplified_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/bartolome_de_las_casas_quotes.pdfIn PDF document text
    • http://wafalox.rf.gd/free_magic_books.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/elfen_lied_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/sofuzapifa.pdfIn PDF document text
    • http://kinowazekuponaw.rf.gd/piwedalawusaxuzosolewuki.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/biology_oxford_dictionary.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_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5032 bytes
SHA-256: b03ab76bd3574f0da8e8892662e5e1c7504ba3d7022fa416a75ccd3adef811a6
font_01_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 10716 bytes
SHA-256: 93f0e802584a3fd8d831636ef58769bd28562cf6be8df58b9d273d9cecb5a295
font_02_sfnt_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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