Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8e130e75973df7…

MALICIOUS

PDF

49.8 KB Created: 2020-10-28 11:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 88d08f0c98193ad8d9dddd44c1ade02e SHA-1: 1aaa0dc52e04cdb9e0e99e4c833c8970ca436e75 SHA-256: 9a8e130e75973df77a6e5de268fb921d0625ada3f9c0b2faf02b64a379f5965e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/strik?keyword=antique+singer+sewing+machine+manual In PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/gakepovilax.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/7811942.pdfIn PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/xikog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/vegabatazosigipuxoxezepad.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/autocad_notes_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/l_amplificateur_oprationnel_cours.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/protein_synthesis_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vascular_and_nonvascular_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/ganesh_atharvashirsha_in_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/fubupexonedamuwoxev.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mckay_building_construction_volume_4_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/39958461146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9398/9278/files/balenumisofofazofikobes.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/93148707257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3492/5986/files/bad_girls_of_the_bible_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/vuverunoripadugefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7103/8122/files/9406209199.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/berliner_platz_2_neu_glossar_deutsch_englisch.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/12004635144.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/advanced_excel_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/86223848656.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/famapodavibexutu.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/31090655128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1466/2562/files/42842901690.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 5420 bytes
SHA-256: d2c2447426b7341d38ca4fa72b63bcb49505f8d1689170f33a72bb3284316d77
font_01_sfnt_off00009615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9615 10380 bytes
SHA-256: 102de0f96e7927ded138c04277b212cf3ef4c9fc6b24fd4669b52b8477f0c2e0

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