Malicious PDF — malware analysis report

Static analysis result for SHA-256 219e70895b84cd0e…

MALICIOUS

PDF

72.1 KB Created: 2020-11-10 12:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d3cfb163b0fbec8c2d51688e4103a140 SHA-1: 175708559f8a3111116c718f84e46353f44cc162 SHA-256: 219e70895b84cd0e27146c6e57319739fa5b615d4ec8817ea4296ea64f5d405b
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to "Lego dimensions portal instruction manual". The presence of numerous external PDF links also points to a link farm strategy. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=lego+dimensions+portal+instruction+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5f944f32526c9.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5d6b7774f0df7.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/kavitokolezub/thinking_with_type_download_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b1ebc6-6cfe-4548-8989-8c1f0f5b887d/zesapinisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1c644b-d6ae-40f1-99c6-8a33a02ca2b1/mario.exe_rom_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5c122f-853f-4163-a680-a575de6a37df/wogajija.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/pamivupupanoxotoven.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/wirijuwogojaf.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/senior_awards_night_images.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/vipodaseganizofemogox.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/ucps_powerschool_public.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2ca801-9399-4f30-ab01-1fb0e69a0603/temuvalekukidanizo.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/donald_gennaro_jurassic_park.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_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 5332 bytes
SHA-256: 634f4472f53c5c333f8e9d7879dd33aa9aef40168e20aeb5409e5140c205aac4
font_01_sfnt_off0000ecaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 11192 bytes
SHA-256: 9c3d8dd9316c1135ace70c6180bd04d70d2928775c8743b6caadbe2f4d879158

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