Malicious PDF — malware analysis report

Static analysis result for SHA-256 512bec2af3cdca5d…

MALICIOUS

PDF

46.6 KB Created: 2020-11-02 15:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e237de5fbced042012e32444ea63d15f SHA-1: 2cdd670970c06ad050ff0e8e6924f74781be69b2 SHA-256: 512bec2af3cdca5d7470e4bdfb6e97df5ecfc23db4c9e7696f0265bf71ad29d8
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.cc/123?keyword=edelbrock+manual+choke+conversion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f88a660738ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f9883381ec9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9b0c02-3cec-426f-94ad-b036595ea83c/rocio_durcal_torrent.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/fuvobuxaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699c186a-3487-45cb-9e6c-3280dbb86fd1/dubigozumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d70c76-4ba7-4741-9c86-dbd152211779/radio_silence_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e4fb7f-9acc-4c14-85ea-cbf6acaf8293/cotton_candy_nail_polish_designs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0709a4b2-485e-4f2b-9d98-253ba0f17ccb/channing_rodd_porn.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/anonymous_naomi_iizuka_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd5d4d8-f08f-4049-96f0-5c1d9705f84d/14436811137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998e61d8-ba81-4bfb-a061-bd451026bd38/povisuwodopip.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/texoganekadewovuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45bfbee-e0dd-4567-b49b-cf25fe2f4873/beginners_guide_to_shaving_with_a_st.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/raxofazitafajiwonuvawuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb20337-7d9f-49bd-b65e-c65e26570d36/th_7_base_coc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ae1fc2-379c-44c9-97f5-136f9d8804a3/are_dogs_mouths_cleaner_than_peoples.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_off000072d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 5400 bytes
SHA-256: ed982255d80ae0cbc8f5bd9d038815b887b1235a364673379a81ec60609f01cb
font_01_sfnt_off00008508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 12532 bytes
SHA-256: 85a21c9b0f892098b6c829fe9dd49bcfce4d2eda44d93b9f25b6537cf453a7ad

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