Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce6edd6c09f07ee…

MALICIOUS

PDF

101.2 KB Created: 2020-12-16 00:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 423697d9ba6f2ba67051635a8c85e8fa SHA-1: 02d53182eccc0619b8d5389bb6bd1ca590565b87 SHA-256: 5ce6edd6c09f07ee75c2131257876ce2bb2a77cc39bef2528b95c0ab2ce4c0db
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL is presented in a context that suggests it is related to musical exercises, likely to trick the user into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=double+bass+scale+exercises In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f89db3b81728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fa155b3f16b1.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/9f63b415-6922-4960-82fc-f41ab55d11d6/manual_lawn_mowers_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/immunotherapy_in_breast_cancer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a7eccf-383c-43e9-836c-f648e2b0c525/56644976698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57164c6b-fee4-40a0-a479-c37552eea49b/tetubam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c50e1c8c741314534cd3/t/5fc9bcbc2ae1264a03912d71/1607056573316/download_piano_tile_the_music_anime_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6ba236-8aa4-4bb1-b623-73b6734e106b/2534395210.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc789d6f140fc3aa58a2e7b/t/5fc9bf95822fbd3263de23ba/1607057307103/kodudurari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294de3fa-6308-451e-a3ae-12e05dff0c3f/life_like_trains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0847bdf-0170-4608-96eb-ddd34b766a1c/atticus_finch_monologue_to_kill_a_mo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac4bfc9-c412-4657-9ea6-171f4c212647/bedipenofixilusep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06e381c-34b4-40a6-8767-6c2ec2b63fbe/morudadaradena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040e0f6c-5338-418e-9ebe-c5b420ad8295/aa_sex_inventory_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf58045-e453-4cca-abe6-5d6437e253d1/full_metal_jacket_happy_birthday_dear_jesus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350ddfeb-1599-45fc-b5e3-d8c644e49e6e/lunifikefunixivanuvuvufi.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/8313030207.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_off0001517f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1517F 5000 bytes
SHA-256: df611e3d145f1e84f718d92b8a0f53b42b4e147c3b4ecc2a18ac5c8f0eb1e6ff
font_01_sfnt_off00016292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16292 11008 bytes
SHA-256: 8f0d7f5bff6029483e6392a5b6c21a6d038bda6dd121a875191d191efd88da6c

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