Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1ff021d5757a8e…

MALICIOUS

PDF

67.3 KB Created: 2020-11-08 09:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 822b9c89ffe801b850548d7852dcad3c SHA-1: bfd4c695893d12c48b9170d04c904539a0d6d2c9 SHA-256: 2d1ff021d5757a8eaf20e3e9abe6b3ea763ee5dc17cf6bf0f11cac8337b1f3d2
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 pointing to external PDF files, which is indicative of a link farm or SEO poisoning attack. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffine.ru/123?keyword=keto+rapid+max+forskolin+ingredients In PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/xadog.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/gozawu-kopabilawituso-kejovigonokola.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/78a8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/dante_xxiv_purgatorio.pdfIn PDF document text
    • https://dowuwiridewe.files.wordpress.com/2020/11/97555239798.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/pisabiganunedopogarosusux.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/54383776790.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/63978612152.pdfIn PDF document text
    • https://vivawoki.files.wordpress.com/2020/11/la_panza_es_primero_rius.pdfIn PDF document text
    • https://xokidat.files.wordpress.com/2020/11/nikulabawanazezupepafadu.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/canton_high_school_ma.pdfIn PDF document text
    • https://gesixaduno.files.wordpress.com/2020/11/qasida_burda_shareef_english.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/nuzenikekosipesa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00008160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8160 3016 bytes
SHA-256: 8cff4a2315366631c02660c03cee9cd20f30b9e8e35cb2eb873ea1224f84d566
font_02_sfnt_off00008c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C12 5460 bytes
SHA-256: 286fdf598721cb28c99f42806a88ea6452db67bc038e0a133c680073c01aa156
font_03_sfnt_off00009e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E92 10016 bytes
SHA-256: 358680af6b88227a2350899bdc92a56f2006d24dd4876debf2a23c13cdd72090
font_04_sfnt_off0000c06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06C 12092 bytes
SHA-256: 8b4f32cf1bbfe62434b52fdaabc0881674348e35167d9ae63ddb237641ac5234
font_05_sfnt_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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