Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2edd4885be6d3b…

MALICIOUS

PDF

66.8 KB Created: 2020-12-17 07:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b3380383ab6c79243ad47b9adfc8b5 SHA-1: 11802a444f8e102434e434fb906df351909ad460 SHA-256: 0b2edd4885be6d3b0d0d41806a4192381dc0a69a0f043a5e2c92d8f1bbf1c4b0
184 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'beta movie audio song' and authoring application details, suggesting a lure to potentially malicious content hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=beta+movie+audio+song
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/e947ae1d.pdf
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/3507037.pdf
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/1a474b857.pdf
    • https://gikemadisasov.weebly.com/uploads/1/3/4/6/134667176/9551512.pdf
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/6779614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wofaxil/brescia_fiorentina_le_formazioni.pdf
    • https://uploads.strikinglycdn.com/files/522a3bc1-8ab7-4c7b-a11a-e73ddbd6ce14/inconnu_C3A0_cette_adresse_personnages.pdf
    • https://static1.squarespace.com/static/5fc0e9fb7d0c8f249d40e00c/t/5fcc1624920f47545b820942/1607210532248/dragon_quest_11_outfit_mod.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf542c4e98326c02076ab3/1606374444596/14076442750.pdf
    • https://uploads.strikinglycdn.com/files/a753dbe5-ffbd-46e7-bfeb-0602add9e435/80155421222.pdf
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc1aff15147b148047265d3/1606529010471/bimata.pdf
    • https://static1.squarespace.com/static/5fc5434cbda9c57a97dae9da/t/5fc6beee0623334b0c489634/1606860527989/mifelirisizoliluxezot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c770.bin
f2105cd6c7572a223213af77677c7988b5026fc3b7365f8f1a2b098d67cb6f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC770 5128 bytes
font_01_sfnt_off0000d8de.bin
37123d6b02cb9715912b5a6ae165d722ee624399122ca6cfa5d1f13acad7ac9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DE 11228 bytes

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