Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3844a520069290d…

MALICIOUS

PDF

46.5 KB Created: 2020-10-29 08:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fb632be77b176652777ebd2d7bcc9da3 SHA-1: d0718fba76e459c3de04437beedfa173f9fd9d8b SHA-256: f3844a520069290d32488f7070dc6038fe18d3ac2c2acf9feed78bbb64c4c6e0
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 1.0000

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://cctraff.ru/strik?keyword=dc+comics+style+guide+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f92820e0bffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f8758860b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f99bdb93c000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f94222d4c76e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f8f86dcb987e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8b5e86d1cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8e9e1d1a270.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/jazofi/the_rover_text.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/pujumidu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/srimad_bhagavatam_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/93555114207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/57641524892.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/diagnostico_situacional_concepto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6348/8924/files/zukabajukijegebiful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/marathi_hasya_kavita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9440/3989/files/intervention_gun_sound.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_off00006931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 5240 bytes
SHA-256: cbf78788a540fdc11019793ec60d8ceebe98218736b8eb7deb94d57d50fae04a
font_01_sfnt_off00007b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B08 10424 bytes
SHA-256: 22c4eb1fe3005be384cfd9f101255a48c81162a29877d4e84a0afc814f42248c
font_02_sfnt_off00009e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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