Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3e69ffa78d99f1…

MALICIOUS

PDF

41.9 KB Created: 2020-11-01 05:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7a513bf8e0e018a65c8e202c43a8b73d SHA-1: de36038394af5859d33699c0ce03c2f88ec91de7 SHA-256: cf3e69ffa78d99f1a8133c048eec4320f7dcae2e3759e7bf15bc52483c95a113
102 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. The file routes users through malicious redirector infrastructure and presents a deceptive download button. 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=mit+app+inventor+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9b949494699.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/bilekazokipo.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/jamie_eason_live_fit_phase_2_workouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3432/8219/files/19788397368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0775/1838/files/sas_zombie_assault_3_hacked_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3138/6041/files/operational_amplifier_and_linear_integrated_circuits.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/nucleophilic_aliphatic_substitution_mechanism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3246534-e25c-453a-8810-425a4445cbc2/bopupivigasawomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b672f9-c099-4b7b-9e86-a639a172354c/jawiwafaluzexire.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/fepapa.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fozaninulekuwojefudin.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/igcse_additional_mathematics_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9770/0549/files/sazuzupogipokaputot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9939/6531/files/huawei_cun-u29_root_apk.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_off0000670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 4996 bytes
SHA-256: d62d922bbb844cb3bf2f54d6d832120f23637f3a4563658e816dc0770afc4180
font_01_sfnt_off0000783a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 10136 bytes
SHA-256: 95d1c8f32e176afc5e5b3c0b029a944f8ba910419cf39018d4cbdd8f57d6ca73

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