Malicious PDF — malware analysis report

Static analysis result for SHA-256 945667ca32be8fc4…

MALICIOUS

PDF

74.9 KB Created: 2020-12-05 11:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 95d806d438061bf8bae686960b278a35 SHA-1: 6de9751ff6e2909eafd464ed4e42a550948be589 SHA-256: 945667ca32be8fc46cc5bc2505b281e543344e35e4785906a7114f58ea3cc6da
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document's primary purpose appears to be to lure users into clicking these links, likely leading to further malicious content or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://gettraff.ru/aws?utm_term=pro+psp+emulator+games In PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/ginagokurobazoj-faxiwilemumotid.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/pijepazavur.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://static1.squarespace.com/static/5fc4d2cadf132613bbd6bc3a/t/5fca5a9f55c2ea51231c41e6/1607096992826/best_color_label_maker.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36057abaecd3318320830/t/5fc878d4b74dd54858da28f6/1606973653201/photo_editing_app_iphone_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cdab3398ff75152d912c/t/5fc4506af8cdb769c66d43bb/1606701168817/29154325760.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54f87c6229360ecca178b/t/5fc7b2485060c93fcd86f583/1606922825200/defender_z4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bff4297-6e65-4c6a-9407-03686ab5d29c/terraria_how_to_make_mushroom_biome.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/73112444084.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/3758674412.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf556efa04221c71174bcb/1606374767551/spiked_lug_nuts_silverado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8e2a13a450babf3c347/t/5fc7adef3ac9c763f4dfd667/1606921715404/gerifubikinegifowid.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/saucony_guide_womens_size_8.5.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/zidinekidenigizozodixo.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/21852156520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76eb2d9c-585f-4621-a9ce-a4e9054e3b03/nomikolodejoni.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_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 4868 bytes
SHA-256: eb898f7a16aac9091aa795eb403f4f2293cf045d61e6983d48b99cfb41cc76db
font_01_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 10996 bytes
SHA-256: a0b7f260e12f71107c35cc700ecd4c6b3d10859e57889a3952e356ee271cfd49
font_02_sfnt_off00011085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11085 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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