Malicious PDF — malware analysis report

Static analysis result for SHA-256 893620391eff1f45…

MALICIOUS

PDF

91.3 KB Created: 2021-03-26 00:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63d904bf4af87da8f9618ec0c4012360 SHA-1: 3517e9f93f964d32c9f8e53619269e6c471658e7 SHA-256: 893620391eff1f45128397820e660da7a22bcfc6ddc23fb2444252ad53c45d79
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on dynamic DNS services or free hosting platforms, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' and 'SE_INVOICE_LURE' strongly indicate a malicious intent to redirect users to potentially harmful content. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/strik?utm_term=how+to+draw+isotherms+at+10+degree+intervals
    • http://bulugivuto.iblogger.org/lofozogibamebetufani.pdf
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/xurasafuwuv_tivinumozamaba.pdf
    • https://bilokomomaxin.weebly.com/uploads/1/3/5/3/135397692/noduf-naxugixu.pdf
    • http://fakabegapufiri.22web.org/is_the_trials_of_apollo_good.pdf
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/aa89f2e684f538.pdf
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/9081989.pdf
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/64b939.pdf
    • http://guwizerawefoke.iblogger.org/vujajozopezuto.pdf
    • http://tubovubunuf.iblogger.org/62329165145.pdf
    • https://xenewonunawof.weebly.com/uploads/1/3/2/7/132740417/1e651438f.pdf
    • https://vamukeroke.weebly.com/uploads/1/3/4/3/134353023/togitibexorofa_ridukidu_nelojilot.pdf
    • http://punejew.mygamesonline.org/junabejadusufupin.pdf
    • http://moxilekulina.getenjoyment.net/jaremametaxom.pdf
    • https://jekodijup.weebly.com/uploads/1/3/4/4/134490718/bafigopikij.pdf
    • http://jugapus.sportsontheweb.net/the_abundance_book_by_john_randolph_price.pdf
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/548658b9a8652a.pdf
    • http://pojapir.mygamesonline.org/simplesmente_acontece_baixar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vipuxafol/lutivawosukotuxosanudajer.pdf
    • https://s3.amazonaws.com/pukiza/22505038715.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/95306744667.pdf
    • https://s3.amazonaws.com/zijivevip/how_to_unclog_dyson_dc25.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/test_cricket_game_for_android_mobile.pdf
    • https://s3.amazonaws.com/kukazowox/how_long_to_read_12_rules_for_life.pdf
    • https://s3.amazonaws.com/nakevoja/can_dx_lenses_be_used_on_z6.pdf
    • http://guseboses.atwebpages.com/begekiveso.pdf
    • https://s3.amazonaws.com/xakapudakadu/tuzesumudesafivufolubet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa0c.bin
438f6dd59f55c94b8f871cfa19a61297142b66b56c992a3dbb8b15ea82196586
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 5548 bytes
font_01_sfnt_off00010ccb.bin
93adce0038a3824ab230ff1947411a69523bf7883a18a7e6decd71d54eefc694
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 3684 bytes
font_02_sfnt_off00011bb5.bin
179683f22f93eda542d9714bbb8c5b2a88fd2a7a79f16c6ba500a0b01833cc05
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB5 12500 bytes
font_03_sfnt_off000145b9.bin
4636c7523e8c0c4659ec89c752f488d70eb2ea504770eb3e0be851c502e4ce70
pdf-font-stream PDF embedded font (sfnt) at offset 0x145B9 16488 bytes