Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e5f044982f9951…

MALICIOUS

PDF

80.6 KB Created: 2021-03-12 01:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 004ffe2533cf4e66fdefad4ebcbaf1e1 SHA-1: 92f999633b0537b2caa9c8ca6584bf53afb7ed7c SHA-256: f0e5f044982f99519be6b0bda62ff9f8dc3b67fa01a1280e5edf2753b35e71e9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://jottigo.ru/wix?keyword=molecular+formula+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411512/normal_600ff6b4064ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_600cb31b75604.pdfIn PDF document text
    • http://katipef.medianewsonline.com/tusizufikovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5fe8b69a47a56.pdfIn PDF document text
    • http://palawawez.mypressonline.com/kipidigutirapukowefotu.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/71435236126.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_70f7665b3f5046b79c7e3742293dd285.pdf?index=trueIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_8edb92737c824f88ac47b96215dc9a30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/mujidigun.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/vuvube.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/rafawomixix.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_e3e3c378c36649fba8fe84e1abf9be89.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_87df6360e3ec46699046845de69150ca.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_fb162463ed6841108850fba3b0068e66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/g._a._m._s_degree_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/77487841948.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/bhaagamathie_tamil_dubbed_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/tabiveputegurexadinado.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/how_to_find_boomerang_links_awakening.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_c9b3593bf1ea4eedafb4af273c8feb5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepawi/89313643050.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/activesheet._pivottables_pivottable3._pivotcache._refresh.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/star_trek_into_darkness_cast_carol_marcus.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/68402544833.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
    • 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_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 5556 bytes
SHA-256: 6bd849638ae6f9690dd90642cbfb23b8bba73ad3b1299a8766d265e6c92c0d0d
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10532 bytes
SHA-256: 809d2cc6433ca1d1af510e6896b4d1a682630392e9a3d9dd6cb5029ae582c18d
font_02_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 16192 bytes
SHA-256: d314bc6d8eea6c3414359fb5c5acdcd16acb89becc02b1f3b15f2e958a85b12e

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