Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0262a2682ed6ffa…

MALICIOUS

PDF

145.4 KB Created: 2021-03-14 10:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 62c892e70e882db710438b82f6d1ef39 SHA-1: 0da0a2495b109804eaeb1165efa2739051f10bd3 SHA-256: a0262a2682ed6ffaadd67578cc46fe97e1301057261f9c617ef5931c08cdce40
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of link farms used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, such as the 'your freedom apk download android' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=your+freedom+apk+download+android PDF link annotation
    • http://design-kvartira.info/countries_involved_in_ww2_94_answersfrnmt.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/nuwebudanupomoranane.pdfIn PDF document text
    • https://xodalolekuxol.weebly.com/uploads/1/3/4/1/134108590/4228493.pdfIn PDF document text
    • https://cdn.sqhk.co/tesuvifiv/jjhdi42/bukhari_hadees_in_tamil_free.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/nanipabo.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/WhchiaN/25856068509.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/3zijfii/dufakiruk.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/sadogamixis-nejex.pdfIn PDF document text
    • http://italysummer.fun/seberekakexikenikefodq7ho.pdfIn PDF document text
    • http://fherixq.com/what_are_the_five_yamas_and_five_niyamas2rlsg.pdfIn PDF document text
    • http://itclick.pro/48736660162efl90.pdfIn PDF document text
    • http://devicesprotectionforusers.site/bitmap_android_tutorial2s62x.pdfIn PDF document text
    • http://parralax.net/sawobosozumikepapyeyx0.pdfIn PDF document text
    • http://options.expert/xosixuvon3tir2.pdfIn PDF document text
    • http://topmassage.net/owners_manuals_onlinetghm4.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/fanaweva.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/reading_aloud_and_silent_reading.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_c264c13bf1bb4675abfed24c77700608.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_5e829621a5f84e41bdb09a3743add70f.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_013f0a2297924710b8335038506197be.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00020033.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x20033 29940 bytes
SHA-256: 032aa7765f70a395956c58df6424a568fb25e3d3f8188e9e8dad6c44d40898ce
font_00_sfnt_off0001c5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5C9 5124 bytes
SHA-256: 7ef87cb46ff941b28fb80bbef94884cf10d16173478fef11d576b90f10efb59e
font_01_sfnt_off0001d737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D737 12840 bytes
SHA-256: 9b6a7c24d1e4caa1ed964afd8bc21d03ad1c7a6d3cb65d69cc2ffcbeb95615c0

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