Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f12c522ce35241…

MALICIOUS

PDF

83.0 KB Created: 2021-03-08 23:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c3c82aecdc793670441296231725145a SHA-1: ed721dba8ddfcc8103394732c372078678b7cbec SHA-256: 09f12c522ce35241d0fb9bf85337714b6ba2a4719d39afb76061d0be22b2eba6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, appears to be a lure related to "El Principito", likely intended to drive traffic to malicious or spam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://kuzutuzo.ru/strik?utm_term=resumen+del+capitulo+17+el+principito PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403674/normal_60051a46f2d5f.pdfIn PDF document text
    • http://bobatukuxoto.iblogger.org/chunari_chunari_dance_performance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_5ff9b50c62154.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/gedaleguzikuvafagak.pdfIn PDF document text
    • https://lameperitilexi.weebly.com/uploads/1/3/1/1/131164355/zeduk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fcabe8a4a7ad.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/jifenozojemiw_kigosikixaba_xuzemokuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_601448f2d8b16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_600455bce801a.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_b247d29c2b7b4a49a61f3ff75da4d4b7.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_bf569373910448578b0a6f09cd9e30d3.pdf?index=trueIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_d7e27b5c574444adb7b295c32a6f6bc9.pdf?index=trueIn PDF document text
    • http://bisumige.epizy.com/vewabovujo.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_2b8625af10ef4d83acebe4eb9a450d2a.pdf?index=trueIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_8428e3f32833425cac451b59704d6881.pdf?index=trueIn PDF document text
    • http://sonunetenigido.epizy.com/dvla_registration_plate_retention_form.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/canon_in_d_classical_guitar_tab.pdfIn PDF document text
    • http://pimabob.epizy.com/filalunizugelavodelag.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_45ba899827ce4748b6ef866874e58dcd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 1696 bytes
SHA-256: 0727529401fe802ed9d02ac4b3bed84f53da9d0a5838f1dab7fe2f7579417e88
font_01_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 5360 bytes
SHA-256: b5991e7752d7d34b236ff408f00148ac7665af54826d7f4796a3df255286678d
font_02_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 11808 bytes
SHA-256: cb2f24150858cd2c4db0ab40011ef7b8c1d919f3e95f25498ad9430d7eadd630