Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fac9ec3dc6833bd…

MALICIOUS

PDF

41.8 KB Created: 2020-10-28 03:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8bb17a42eb4107aea085cd24bb8c7561 SHA-1: 84f9d964cf7954a8569cb794642a624143579cda SHA-256: 8fac9ec3dc6833bd0e36766ae10df3400b62919ed16687bd5105ad059181bd45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The embedded links likely lead to phishing sites or further malware downloads, indicating a malicious intent to redirect the user to harmful infrastructure.

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://cctraff.ru/strik?keyword=statement+of+ambition+eagle+scout In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bajibofejexonib.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/9867956.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/xidobitabevexat_pawoso.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/d3267.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zofamabam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f8a54e29b1d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8709b36ee47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f9524471ebc7.pdfIn PDF document text
    • https://vudepupebowazuk.weebly.com/uploads/1/3/4/4/134472779/e3c644aac0.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/pibinix-jaburopunozulu.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/3230146.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/abef22d064547.pdfIn PDF document text
    • https://zadavutuni.weebly.com/uploads/1/3/4/3/134343582/duponikepemelujed.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/kakekojezutok/zuxise.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/82413407082.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/pdf_to_word_doc_converter_free_download_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/jumbling_reasoning_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/wozepo.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/beethoven_moonlight_sonata_2nd_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cbse_6th_class_maths_worksheets.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_off0000654e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 5348 bytes
SHA-256: 21037388ccbd582d8e60d6aa22a58ad22332194cd950b88c8c531cd5f6130ae6
font_01_sfnt_off0000776e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10156 bytes
SHA-256: b4949c842d5ef237cd9b436f007360c512e46f3bd7c3d4f70f851491c37e1572

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