Malicious PDF — malware analysis report

Static analysis result for SHA-256 de080d72aefd238c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-20 17:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d7aaa7c620ec044d7d1c4d4febcb2b93 SHA-1: cfbed03521788e297ae49d6b2bae5121f10e833e SHA-256: de080d72aefd238c0b69d8d2b5459a3071562c51192c24961d5a39c2bc834c0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to the embedded URL, suggesting a lure to external malicious content.

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
  • 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://pelibifir.ru/wix?keyword=always+let+your+conscience+be+your+guide+blue+fairy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469386/normal_5fdc2df7824b4.pdfIn PDF document text
    • http://reduslimitalia-official.site/gimedamolafivasaposubkib9k.pdfIn PDF document text
    • http://easycreditscore.info/65925653076ktjuf.pdfIn PDF document text
    • http://aires.fun/2597874597258gxy.pdfIn PDF document text
    • http://cetop.xyz/all_sad_shayaridzzxt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_6037d17baf081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_604731a762dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_604a4863a2c77.pdfIn PDF document text
    • http://unosital.space/tigizesinuriludospi63.pdfIn PDF document text
    • http://smeshnoykir.space/28998195688z1uu4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_0586866e5df9438b8be2ce3032b18239.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/bevujexoxi.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_144a1f25c9cf4fceb1f2331c012d553d.pdf?index=trueIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_e0b2aa0747c34a599edee12bc1bdafa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/87147226219.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_d1a950032e58484fba6b46eb8dcf308c.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_c810f3944b3f4ffaa5eccd1d8a27d678.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/11558532433.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_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 5512 bytes
SHA-256: 9523132215b6da8fe6a6d3a5a91c7ebaeb8d82ea9153d8f888e956de0f7cc864
font_01_sfnt_off00010355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10355 11160 bytes
SHA-256: fbc9f4830a6c2fdf9e42957cd21155c364531fad58e84bf1daddfcde58342198

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