Malicious PDF — malware analysis report

Static analysis result for SHA-256 feac7037a1e44131…

MALICIOUS

PDF

90.4 KB Created: 2021-03-19 17:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1a622e9ed5a76fa283b94d3a354de91 SHA-1: 747efeb1a3e1aa9385a98ce7d8cadae04c87ff62 SHA-256: feac7037a1e4413128166994baba105d5bf188e2c5c317d0f5ca55ee14c389a3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://botokaw.ru/123?utm_term=abbott+and+costello+tv+show+episode+guide PDF link annotation
    • http://xukejufivakege.iblogger.org/how_to_fill_out_a_1040x_amended_tax_return.pdfIn PDF document text
    • https://dukikabapesudux.weebly.com/uploads/1/3/4/1/134108868/rofokatik.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/lowodudomaseleg.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/a30324.pdfIn PDF document text
    • http://tularobumof.66ghz.com/bitter_gourd_seeds_information.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/kafagenegu-lebanodot.pdfIn PDF document text
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/lefagavude.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/muvas_mufemikisuvisef_jivazoponavir.pdfIn PDF document text
    • https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/58493181c278.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/0d01b.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/fizaxo/reportage_famille_nombreuse_septembre_2019.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_15ae9af053a94edf80d4659e8221f00f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofiguj/abba_songs_free_chiquitita.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/zigabamitogimilunawexon.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/bescherelle_espagnol_pour_tous.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_6f923a60632c4a78bd30cb90c051249d.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_abdc1bf06a5742549b496b70b49aac3a.pdf?index=trueIn PDF document text
    • http://motinekan.epizy.com/oppo_a5s_coloros_6._0_update.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/cisco_sfp-_h10gb-_cu1m_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/16183213754.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/batakurezexipewoveta.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/chakra_healing_music.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/84901649552.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/brother_mfc-7360n_replace_drum_message.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 5520 bytes
SHA-256: e9257ad7dde2544d33f26e9405f8b242872375ee77f4a852701ae0361419a038
font_01_sfnt_off000113ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 16912 bytes
SHA-256: a933cfc8157913906d0e44b41cfcf6fb3f7273299183f9b89b3cf207d7711b0e
font_02_sfnt_off0001468f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468F 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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