Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5c209ae110af09…

MALICIOUS

PDF

77.4 KB Created: 2021-02-07 22:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: eccac2592b1ff1b74263c3eb4090f7fa SHA-1: 814598d82b15800c1bb8b54d8a11edba449db91f SHA-256: 9d5c209ae110af09fac17d122fec80c2e9f90761957eb918d9589a492b0067df
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of urgency language further supports a lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/aws?utm_term=incident+investigation+and+reporting+process PDF link annotation
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/2474784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488130/normal_5fd619c60b322.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/1639755.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/bozusexoxedet.pdfIn PDF document text
    • https://xonatiwomunonow.weebly.com/uploads/1/3/1/8/131856992/wonalop_teworinori.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/zazajur-nawiduti-nifegeval-wiwared.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/7699147.pdfIn PDF document text
    • https://wovinimupilof.weebly.com/uploads/1/3/1/4/131453577/572982.pdfIn PDF document text
    • http://gufutaca6.xyz/tepogewanorewozofupukihxaqc.pdfIn PDF document text
    • http://noncomform.space/jiduwidodokeffyskq.pdfIn PDF document text
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/763604f9.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/70de4a5e33.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/satuja/smarter_goals_template.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/89467166229.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bookwright_won_t.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/adobe_photoshop_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/65391117780.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_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 5208 bytes
SHA-256: ad1bc1ee7a325cb4fb6d7730e41845ae1b670e89f6d2b5729b0b25be11367715
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 10260 bytes
SHA-256: 6813a5ce80c40e0abee1daa0b37618daef2bcb115c7f83238d16bb87bf3e25a6

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