Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e235d345211f22…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 02:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd32545e64a7269c51112b4219d19c43 SHA-1: b005a8b57854160786499ba8446c6612ba96a486 SHA-256: 80e235d345211f2258609e04a6f9da57d6819f2d5959a6905ffc5c01185bfa3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=bleed+like+me+book+pdf PDF link annotation
    • http://vudujupuboneg.22web.org/xexobetulesomatazud.pdfIn PDF document text
    • http://konufij.22web.org/what_do_the_poppies_represent_in_the_poem_in_flanders_fields.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/astronomie_populaire_camille_flammarion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_6051a6f352b50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455914/normal_5ff04459111aa.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/juwilepazebatolapor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_6050c9e50bbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fea0082483a7.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/dejonakanuvopinumeloje.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/36149456216.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/gabogowuli.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/85094474060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_605050763877f.pdfIn PDF document text
    • http://lubogexu.22web.org/explain_how_to_use_the_standard_normal_table_to_find_the_probability_associated.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wegugoleta.onlinewebshop.net/map_of_continents_and_oceans.pdfIn PDF document text
    • http://bujoraz.rf.gd/52992658047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2ce0dd-e78f-412d-8af5-e1ef7a8e178f/belovami.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/ap_biology_campbell_test_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a15ca1-686f-4a9d-9b96-3d1f66f01ea8/72486220080.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/zojuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51def10-0486-4b61-8ec3-be5f4bd6d465/62863204666.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 4956 bytes
SHA-256: 8e5503f6fe3a37db67ebb9cafb40c943d1b16ee4b98a107bc026c3e885c9cb53
font_01_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 11052 bytes
SHA-256: 61af05514b7d2b3ab879a1202d34f8c4b0a0d9bcd186f5733bbc9e084c022e9a
font_02_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 16248 bytes
SHA-256: cacce353daa52449aaa2dc03ff14e12d7f37b8e2e541d6bae97b449db5f5a003