Malicious PDF — malware analysis report

Static analysis result for SHA-256 480d1cb9a2d57f5e…

MALICIOUS

PDF

73.3 KB Created: 2021-05-22 02:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ee14aed1f8a97365bec1715b56c83192 SHA-1: 108cea607859c4a5fdafe0d7df51831ea3b8c984 SHA-256: 480d1cb9a2d57f5e3a4ddf57734692fcf9139f7e4a4fc1e2c283f03f3b11884f
104 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 embeds a large number of external links characteristic of an SEO link farm 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 0.9998

Heuristics 5

  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/strik?utm_term=the+cuckoo%2527s+calling+movie+download PDF link annotation
    • https://befuvabesuwab.weebly.com/uploads/1/3/0/7/130740391/bdcef.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/2c350d53d382a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475204/normal_602ad5231edd4.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/fajim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_6010a4cbe8bd8.pdfIn PDF document text
    • https://fozikevogakol.weebly.com/uploads/1/3/1/4/131437046/1216535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409093/normal_604d305dc07eb.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/niporofez/grama_sachivalayam_hall_ticket_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/77597163044.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/google_maps_street_view_mobile_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/what_has_2_valence_electrons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2273065-c158-442d-8827-d565e3384cdc/how_to_read_music_notes_easily.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34be6d4-69a2-4195-9749-c15cbe683c37/87186500455.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/vabusid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294afdc9-fc22-4d65-8398-52f6b9b357da/2017_ford_f_250_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/mappe_avmap_geosat_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/adcom_gtp-_500_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/latumewewunepogifupova.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_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 5456 bytes
SHA-256: 5de1e272a467bcdd0a86c6c8d7e1742a7ad9fc2fd8e6f9cfaf168a2f203555d9
font_01_sfnt_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 10528 bytes
SHA-256: c0977cb84b7685f74f66380f20e535bc7ff2c05e990142eada194e7b03d86025

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