Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b50fc57d4f7c06…

MALICIOUS

PDF

82.6 KB Created: 2021-02-24 23:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd87464e180e364beff292ba6157db56 SHA-1: 9b34e68bc6a0be87c72901c6abdd2514bc8aa1b4 SHA-256: e1b50fc57d4f7c06ba77e2adeadbb1a3712a19fc8233a253ee43d5c8506b7844
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/wix?keyword=e+prime+2+manual PDF link annotation
    • https://cdn.sqhk.co/nobutowug/iJFhfSN/90502084662.pdfIn PDF document text
    • http://legiontry.online/vibapz288z.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/98754096542.pdfIn PDF document text
    • http://thrivewebs.com/multiple_photo_blender_double_exposurel0am0.pdfIn PDF document text
    • http://supermagazforsale1.xyz/gugozodetabinilalebanq0pnk.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/ejbifhg/lazowizuk.pdfIn PDF document text
    • http://classkaod.ru/ventajas_y_desventajas_de_la_recursividadnjhi5.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/neferumakazubexo1lh.pdfIn PDF document text
    • http://voicebftyi.com/athens_tech_nursing_intent_formglzss.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/fqHih5d/81683051480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_602d0ecad7b96.pdfIn PDF document text
    • http://belkwigs.com/38282974057w4k5z.pdfIn PDF document text
    • http://macsk.space/manualidades_para_nios_con_material_reciclado_botellasrdrez.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/wozoxub/69761797104.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/jisedawasaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 2960 bytes
SHA-256: d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796
font_01_sfnt_off0000fb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 4876 bytes
SHA-256: 283d61d313c130f1bf477cf104676def107840ec027c962e909a55326ce1a903
font_02_sfnt_off00010bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBD 16320 bytes
SHA-256: 63dde2ffc1c3a3dc83ef467f3068d0d09a142f9ddb56f2461712c077a5a74cfb

Open this report in the interactive analyzer, or submit your own file for analysis.