Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1886cc314eec1d…

MALICIOUS

PDF

72.7 KB Created: 2021-03-22 01:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ec3c8b43ef9134bac844d3b6b2daed9c SHA-1: b47f331a063a9838fe25464633c0c7cfb6e7d307 SHA-256: fd1886cc314eec1de73147580aa7fde1251652acfa9568f72f563e47c8fe85c9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and a heuristic indicates it is a link farm on disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The document body, though heavily obfuscated, contains keywords related to 'packet tracer' and 'configuring trunks', suggesting a lure to disguise the malicious intent of directing users to a potentially harmful URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/wix?keyword=6.2+2.4+packet+tracer+configuring+trunks+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413848/normal_6057cbedb167f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fd26d5e31754.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/75345110984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_604ccb84632ff.pdfIn PDF document text
    • http://dubotivuga.22web.org/bumexuvefixifepipimaleze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5ffdad2755be5.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/gesto_financeira_pessoal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_604d328f6e68b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d761be-451e-4a55-af35-841ec62d81ef/la_republica_de_platon_libro_2_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9254cda3-0c98-40b9-a147-f6086c6c0e41/maserati_granturismo_2020_cost.pdfIn PDF document text
    • http://letozin.rf.gd/cinema_4d_latest_version_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749ebfed-236e-46b2-a138-409ebbae7ff2/26200171464.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_2e26907795b240da8fa25e6f4f4ddd77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f915d-d681-421b-9801-b540f30e3224/sonic_large_tater_tots_with_cheese_calories.pdfIn PDF document text
    • http://visevagopar.onlinewebshop.net/40374785132.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_dac9869ac5db4ac2b4460b733d8c3447.pdf?index=trueIn PDF document text
    • http://romudiforexove.epizy.com/sonazax.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_41365595945e4746a123dc326fb8a000.pdf?index=trueIn PDF document text
    • http://jogosefuvevol.epizy.com/arsene_lupin_bahasa_indonesia.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_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 5620 bytes
SHA-256: f9c944694ec3a326b054d20a24841bcb2bf2ca38b0bc32462aee05370c31d9d5
font_01_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 11200 bytes
SHA-256: 419fcd526c4cb29bc76c03f99b4dd46fee3d657a53a781a354b56704b27ab0a4

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