Malicious PDF — malware analysis report

Static analysis result for SHA-256 520fc738edaf1fbd…

MALICIOUS

PDF

64.6 KB Created: 2020-10-27 09:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 65c082fe7dbaa0800c54d07816c2ce02 SHA-1: 1a77755bf9dd619de3b1873f518bbb61bf1e1fae SHA-256: 520fc738edaf1fbd7670f15d5ddd2d277ff876d80df06abd05cefda4b683021e
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 0.9999

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://gettraff.ru/123?keyword=critical+thinking+11th+edition+pdf+download In PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/zazapekigazuripunugu.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9938143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f886675382cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8b5bb1de37a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87009971421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f8ce04d1dc7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5f92ff8a75833.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/f996227b-ca77-4f13-9ef3-e5a006db7f66/biblioteca_electronica_caribe_64_bits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44382ba0-b088-453d-8028-0cf4bccfafec/vidoruxesidoxesalufisusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77287764-1a61-40d1-aa83-8295f050eac6/jigazijuxemiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acad62ca-5ec9-4c87-a3f7-8997d86582a4/kenimamuwatof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c63f1ca-c19e-4741-9f25-2d091401c4b0/metodo_kaizen_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/conjuntivitis_bacteriana.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/daputoziloxakeloget.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/creative_resume_templates_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/amygdala_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/dosamurebikitedaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/57634541101.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/46654258848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5839/1971/files/empire_total_war_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1411/7293/files/file_splitter_and_joiner_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2647/8768/files/combine_jpegs_into_one_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/ropipegokegujaxafamodamup.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_off0000af9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9C 5260 bytes
SHA-256: 324a2f50fd76d0ea68840c5e6385f5037facc918ca98bda917b5262453047d94
font_01_sfnt_off0000c182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC182 10652 bytes
SHA-256: 32dff45afc781493982147e45c4f1ada8e1d2e88b389c0c8450cc8fec590a579
font_02_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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