Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bacf6bf2a55c19…

MALICIOUS

PDF

68.9 KB Created: 2021-03-14 05:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dabc22af2d7531763b5aba83a89c95e6 SHA-1: 28ef881fa1caa55c76e93810acd1bd2bf5490717 SHA-256: 93bacf6bf2a55c19d058c6369ac4f1457307a9e1dcba7ca8c93bfc4a1360ff16
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ponafet.ru/wix?keyword=doge+2048+hacked+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fd81488dc541.pdfIn PDF document text
    • http://francobusiness.com/a_book_of_luminous_things_downloadlzuvc.pdfIn PDF document text
    • http://myyshooop224.site/besinubugiwuxejesegugi7pvn5.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/FfS65ji/jakawiwifawobemobabipog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_6042cfbbb85fb.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/6sRhVtC/my_pc_part_picker.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/jf4hzAQ/duzolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fd266f3a365c.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/hhgOicM/splashtop_streamer_download_linux.pdfIn PDF document text
    • http://sis-paypal.com/william_cooper_mystery_babylon3xc7j.pdfIn PDF document text
    • http://copyrighytsupport.com/mevat5f8h1.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/B09zkha/6967281285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5ff5b4c2a145f.pdfIn PDF document text
    • http://dronextactical.xyz/xopolukimedowog1uqjg.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/zodawanuror/coplanar_waveguide_ground_via_spacing.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/the_merchant_of_venice_quotes_about_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a077da17-b7ba-4f9d-8f76-87826e21a0eb/66895049839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56086376-ede9-440d-a8db-c09cfd642686/zumapov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757f4380-9465-4b0f-8faf-8a985f193b67/mesujupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92189e82-ef97-4dbd-b48c-1254709cc247/mckinsey_global_media_report_2019.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_off0000cddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDB 5688 bytes
SHA-256: 46d5c1b1e1ff15e1965d674314bc71066a9dcced9fec34df3b0c77425a99a7fe
font_01_sfnt_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 10556 bytes
SHA-256: a2f23e3a8c3204b4d8418c363c0293cfa97baa26206eedc18f4212eee71006e0

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