Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ffb25dcb20f34f…

MALICIOUS

PDF

39.2 KB Created: 2020-11-03 16:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1fe07d399928401c48b5d11bf5928cef SHA-1: 2c7f41971156bbb7ff3b2d8d9a24115c2bd24e3d SHA-256: 61ffb25dcb20f34f804de63cceddf28351b97ff6ce5c4311c4b31cc3e2277460
94 Risk Score

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://ggtraff.ru/123?keyword=aapks+store+download+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defipedibe/friendly_letter_format_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/weather_channel_live_updates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb8de2e-0f1b-4334-8a75-6f22a797daf7/zazivepit.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/world_race_gap_year_training_camp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3aef1d2-b057-4198-8327-20781fa90c6b/sejirepopebolujetadote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5364573b-2dc6-41bd-8bdf-7c78aef59efa/is_my_grandfathers_brother_my_uncle.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/apes_prep_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec721729-6804-457e-ab18-ef5596ea2bf4/columbia_county_elections_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b1a7da-2b50-4ad6-8f61-92d93a255fa7/red_queen_grenade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfa1fab-113d-4f70-bb17-8301a375c218/lebevovojizipenibodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea6c729-311b-4edc-a3d7-e6d194ab3322/85629090867.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/kagugunumodarut.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_off00005c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3B 5180 bytes
SHA-256: afea426e754faa77d17059691457f92f40e40ef8cffadd51267b3d5e71049120
font_01_sfnt_off00006dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFE 9952 bytes
SHA-256: e9e372323205ea50b9f277732a8de3bdb417a7624a6595ebb44dcd7c17deabc2