Malicious PDF — malware analysis report

Static analysis result for SHA-256 f764dbe753d82d6d…

MALICIOUS

PDF

60.2 KB Created: 2020-11-03 01:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cce0bb7b6b72c5e4b794389005fba693 SHA-1: 176d84784519267dad2f244549c92c3612e83909 SHA-256: f764dbe753d82d6d39f89094706556453ad6fc205ce6111a7b2e06440041ae02
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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.
  • 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://ggtraff.ru/123?keyword=sorcerer+leveling+guide+tibia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5f95b3174876b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5f962a49e9ee8.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f8af13a0a355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f8a72163e576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f8a5da894ee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f95b92a32326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5f922e8f522d8.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://s3.amazonaws.com/jamokaroxoj/fozadipugamabuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380e8648-72cf-4028-90ce-760cf6facf0b/exo_love_me_right_download_ilkpop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3879/0562/files/health_and_wellness_lesson_6_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/contexto_de_produccion_y_recepcion.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/walmart_threats_this_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37333440-ce86-4ef6-8163-a8bab10995a7/formal_languages_and_automata_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e9aa62-d37d-4de0-8500-4a4dcf9c6518/62811507857.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 3584 bytes
SHA-256: a5b554ee140e0fc22353beee49938db6a4f3091ec2bf115c91a4ded6c8df386c
font_01_sfnt_off00009a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A86 5112 bytes
SHA-256: b382d089b817ded5d51af0e22a7ecbca8153ee82daf9d4b5eb88e365fbaff6c1
font_02_sfnt_off0000abeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEB 12152 bytes
SHA-256: 024344e781e750b70289c809babc999b85c903643e98e927f28058e68b523400
font_03_sfnt_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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