Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49e7364ee8f95b3…

MALICIOUS

PDF

42.4 KB Created: 2020-10-30 01:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be9966ac0e538475c7dae20c01696f61 SHA-1: ba7fdd0cc54b6a32626ae63af0cfeeb38aec3f1e SHA-256: f49e7364ee8f95b3ea600a97f268e783237170a300bcc1db0ff759dfa5cf45fb
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/pify?keyword=little+prince+quotes+stars+laughing In PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/butoj_xudul.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/semoze-juzelorari.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/bf7f68c1-50b9-4df7-b934-af1110ecd05d/vozalusojekosuzadopol.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/60905304645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfadc20-061c-4b79-a5f8-9be9b8c3015b/komoroduj.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bacterial_genome_sequencing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3577/0023/files/wow_bfa_pvp_class_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2251/5865/files/divine_law_books.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/automate_app_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86acb7a0-9546-485a-81a0-f587dc393ec9/fiwikivu.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/drug_information_handbook_for_oncology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8871/6976/files/vesalonebaruza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3204f8-91c3-4a18-b53d-bd0aace4fb43/nilibavadokubuvaramipevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8534/1886/files/android_toggle_button_radio_group.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/85234975616.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_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 5260 bytes
SHA-256: 9c3d02c910d08b430ab509f4df52c4de0673257f9135df343dd8fb4a3b6a14d5
font_01_sfnt_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 10556 bytes
SHA-256: 1f4ac8778e40948e3467ef0dfdb83cdee5f87b6772180af1429315d4d71726bc

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