Malicious PDF — malware analysis report

Static analysis result for SHA-256 825ee48200fbd1fe…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 18:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 85a9969f07024def18124269ae56fefe SHA-1: b19b2c868ac05281efd82ca8a4312788576d2307 SHA-256: 825ee48200fbd1fe2f0956c2cb9c0c9d7d54ef4278db96c82dadfceabb6a33b2
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/123?utm_term=henna+hand+designs+templates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472486/normal_6004fa02167a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_601952b7e2dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fe33f3352d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5fd3689e417f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5ff88ccfe3fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_604fe58030236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_600bba9abdbe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5ffc471776e96.pdfIn PDF document text
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/a68c68aab87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_601477dca5ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_603429caddf8a.pdfIn PDF document text
    • http://gesizuwumog.iblogger.org/how_to_change_a_delta_monitor_shower_valve.pdfIn PDF document text
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/7973635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5fe1c6e514e1f.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/7897868.pdfIn PDF document text
    • https://zuligaxexepe.weebly.com/uploads/1/3/0/7/130775912/9665987.pdfIn PDF document text
    • https://voladivilutefuj.weebly.com/uploads/1/3/4/5/134500748/kidumiwejojitot-vifopokan-boviz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_603b200288bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5ff30f1b93505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_2e8b6585199948369616aee56ef044ec.pdf?index=trueIn PDF document text
    • http://fupewazogapoda.rf.gd/55690600948.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/tozimizabezolatisofip.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_1c91d813699848af85827fe6598f0d16.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_7534d94d561948bfb7b4c49865237412.pdf?index=trueIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_18bb7d2684e8465f8b6988489fd15a99.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_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 5240 bytes
SHA-256: ee55bc48bd1d2f7a476bf8edea9c39a35b0aa0c3b6b0c4f4957a459017abec02
font_01_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 10752 bytes
SHA-256: 381552fd7c6aec9331149cde9cba563bcd87b326acaea81ba2092bdbf432ad70