Malicious PDF — malware analysis report

Static analysis result for SHA-256 23091069669a1b6f…

MALICIOUS

PDF

72.2 KB Created: 2020-11-24 16:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f7f6bbce77121326ab840744eec63240 SHA-1: 528837e7d27433210f7a47d5cab8a1a9b11dc972 SHA-256: 23091069669a1b6f87405bd76bed0e04d80fb59caf04fc243c9b63d708e3ba39
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Oregon ducks uniforms 2020'. The presence of multiple external PDF links suggests a link farm or redirection strategy. No scripts were extracted, but the overall structure and malicious link indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=oregon+ducks+uniforms+2020 In PDF document text
    • https://wolegowagu.weebly.com/uploads/1/3/4/4/134404953/480a8a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_5fbb094357ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_5fab0965d17de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/09d69dd6-b69c-4da0-bf9a-9329d2aae3cb/bitodosugidaroloziribugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d81878-d2f1-4725-9dc4-e376a2f93439/currency_exchange_chase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9681c69f-184b-43e5-a4c7-d80c3a83db60/the_all_new_switch_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd8f4a0-baef-4d50-a329-637268b68d81/14364407918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8800f731-9f39-4920-9713-c6000aaf6579/45602392156.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/wuvijazebabotipezanur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e33295-5ef6-4b8e-914b-7117c522aed1/2717193925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4adb7ad-a850-47b4-b0e1-b57ad4355dbd/suxanikizonuzedebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e77226-e138-40a7-bd4a-6937bb8f04c7/63651003026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 5268 bytes
SHA-256: 048d4c0b70d1cb6341e9e4439005b9873b6e00bfb6f6fa04c0783e3096350f64
font_01_sfnt_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 10684 bytes
SHA-256: e58f97ce0f8cf6ce4a423691e2ac12a388faba56b7bdf16cab614eed13908875
font_02_sfnt_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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