Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d31edd4d62cb92…

MALICIOUS

PDF

82.7 KB Created: 2021-03-05 18:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 79882f0745b9bba5ce5a77dc23ba2b4a SHA-1: 2631a0820be039de31272ec8b86dbe0633408dff SHA-256: 46d31edd4d62cb92d153469a573a759f4958d0a3f7df1675670a388846702009
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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.
  • 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://fokemale.ru/wix?keyword=panama+religion+dominante PDF link annotation
    • https://cdn.sqhk.co/luwesefizi/hhgfHtr/91533110425.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/introduction_to_chemistry_bauer_4th_editioncfp75.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/jQwwUpg/wijibewulafipebanasagijep.pdfIn PDF document text
    • http://im-marceting.site/rabugimiluzeputupokfdegv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_6027ee4a40009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_60323e44a0fb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481163/normal_6007fb811d02a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6034c217d2e23.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/32565626951.pdfIn PDF document text
    • http://instapresent.site/5_seconds_of_summer_calm_album_release_dateydjgr.pdfIn PDF document text
    • http://zdsshop.top/fireboy_and_watergirl_online_cool_mathmsc9k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_60326dbde6658.pdfIn PDF document text
    • http://talemine.getenjoyment.net/lamilizutoluse.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/OjgLLgc/besodalavekosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_2aab0f0a4366486ab1b28184fc3490b2.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_bd27facf87bc40419faefc2afd59b0ee.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_cd6afe6648824e73aa1762a32494c3e7.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_66c90661bb3d4159917f363e8400ef44.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_3fbe1b3fe7cf4aa0ab09aead4229d440.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_3a936e66843048c6aa97d1e709b294e5.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_38a8baa753f94367940ff7a30777a891.pdf?index=trueIn 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_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 4968 bytes
SHA-256: 8c3fc1394ab566e1fa4f843c6e8104c4f9cb0b39c80f0dac16b86447061f3b05
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 10460 bytes
SHA-256: b59acd14ba2a9afe3f4304dce65fc63efc7263c855acbc992d89ee62d734f072