Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eef374cc505ea94…

MALICIOUS

PDF

77.6 KB Created: 2021-03-29 22:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e7767f78897246e93a36e3e08cbd7939 SHA-1: 01fe1b53a491b974b04c49b34b2981cf18b002c7 SHA-256: 0eef374cc505ea94b687c6ff7bda03024e9d6f4b523ab534bf65ffb298ffa0cc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to host or link to a large number of potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/123?utm_term=butternut+squash+lasagne+sheets+calories PDF link annotation
    • http://grizhoff.ru/lobipusodezixaligamozan3a2s0.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/getujuruzijubupo.pdfIn PDF document text
    • http://subbellassecret.com/onn_remote_codes_for_lg_blu_rayx29q0.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/rewutu.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/nitelosisanusazepuv.pdfIn PDF document text
    • http://lovemecompletely.com/gaterunetawi6eqrv.pdfIn PDF document text
    • http://forkidsshop.online/safufepojawekosuzaftqspl.pdfIn PDF document text
    • http://ygrash.website/251974405342z1v7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_e59ee242539a429f8efceb6127923d59.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_1c312ccfab7b4e95be6348b1d5beaf28.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_cab702ff60b04b1b8d9a600aadc52e17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/signos_y_sintomas_cetoacidosis_diabetica.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/numerical_methods_using_matlab_mathews.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/how_to_become_grunge_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/96189784982.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_2ca84be31b1844bc9178283a1b85e628.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/do_i_have_short_term_disability_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/zoology_projects_for_class_12.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/gastrointestinal_tract_mcq.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/jumisigamelame.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/seven_years_old_song_mp3.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_6209de05081d4027b11a50009afe7fd2.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 5236 bytes
SHA-256: c7fe04c76fb3307a38fae9c2de3316705e615395f3fec0f6eb7f02c7a869af73
font_01_sfnt_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 10916 bytes
SHA-256: 728604f4cc375db9f8c7f20f0306bdc13054cdefb8465f982bee42c10ccf924c

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