Malicious PDF — malware analysis report

Static analysis result for SHA-256 0039fd3f6c19bf16…

MALICIOUS

PDF

42.1 KB Created: 2020-11-03 13:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2047337e1a0046d853c7a75c31877118 SHA-1: df2857d5200e0b1d5042c02bd476b6f93a6df2e9 SHA-256: 0039fd3f6c19bf16f46645f2569484d0f3c02a72edb8b3d00566db1d0214ba61
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/8058607.pdf.
  • 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.ru/123?keyword=whatsapp+hacker+app+download In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/8058607.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/5854888.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/c8b9ed7.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/siluvilasoniz.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/f3f969f6-3a62-4c6d-9d70-8e2c39806564/butimimutepoliparozadezaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9394/1143/files/bibujataruvujupatuxazubuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/nugujufapakefavabepetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad18e42f-8a0e-421a-870e-b75e2abda344/povevaxexugexuguwami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f0df91-cf41-4ced-9953-892ac142c4b1/konewufewapulopabivapisup.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/sevuw.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_off00006841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6841 5332 bytes
SHA-256: 2793fbff1f31d7d7aa40a73b33142b06e6361761f3b55c16a981c5af89da7bda
font_01_sfnt_off00007a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 9868 bytes
SHA-256: 9691c0273033beecf8339f73e04745316bdcb5a5f8c351ecd5b8c57ace94cc06

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