Malicious PDF — malware analysis report

Static analysis result for SHA-256 db27ffa8d70256ad…

MALICIOUS

PDF

88.0 KB Created: 2021-03-11 08:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dfeee7e7744728c7e2992ea6ec3ffad SHA-1: 7333f1e5005c75d115e3c33e0823eed31991ded7 SHA-256: db27ffa8d70256ada6f4dd0f4a9a905d0b54c68b3d01c74084b50b376d79069f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning tactic. The primary URL, https://midufefew.ru/award?keyword=dream+on+bass+tab+pdf, indicates a lure to a site offering a bass tab PDF. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=dream+on+bass+tab+pdf
    • https://cdn-cms.f-static.net/uploads/4383804/normal_6044fc6c110c9.pdf
    • http://duwudivusupo.mygamesonline.org/lemoka.pdf
    • https://doxediseweroz.weebly.com/uploads/1/3/4/6/134634010/64cca44fa153.pdf
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/82a10698f7cd003.pdf
    • https://cdn-cms.f-static.net/uploads/4401994/normal_5fe6f33f1ff38.pdf
    • https://tagudosalanuku.weebly.com/uploads/1/3/1/4/131452811/porozunuberojedun.pdf
    • http://hookup755.fun/ibps_clerk_form_apply_datescmia.pdf
    • http://return-0.com/piguwovebulivokamalc2sus.pdf
    • http://rumurel.mywebcommunity.org/the_grand_miracle_cs_lewis.pdf
    • http://detonic-buy.website/sample_motivation_letter_for_scholarship_applicationqkqhd.pdf
    • https://likimipezerejo.weebly.com/uploads/1/3/2/6/132682052/e5f7f.pdf
    • http://hookup756.fun/xokowobalopipazadud3rnye.pdf
    • http://bilet-pdd.site/pakofawufisaxavegu250bl.pdf
    • https://devitigofe.weebly.com/uploads/1/3/1/0/131070043/8993745.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_b8ef9e80acbd41d0bcffb78ee144609f.pdf?index=true
    • http://vubelifijam.atwebpages.com/ao_del_modelo_atomico_de_dirac_jordan.pdf
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_342cbbec1bee47beb06b873e7b6ade05.pdf?index=true
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_95bf1156d9224663a57322663526fc68.pdf?index=true
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_deaea67e3fdd41918610b261e1aedb45.pdf?index=true
    • http://zogadawedalifap.onlinewebshop.net/what_is_the_first_harry_potter_movie_called.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_d273d56a8de34b84adf9294c5c1bd37a.pdf?index=true
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_93b98c91151f4ffb97685e5909851ebc.pdf?index=true
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_ca7c06e843be434d829ab39a3aad5b11.pdf?index=true
    • http://kakasis.onlinewebshop.net/lusomedaxupopufotavol.pdf
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_5de4f133b67f4903b1462a8928221629.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff7.bin
2a7acb4831bfb0f822165ec7ae2685e3c1c3745f1e14a33bff58a3b47753bf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 5296 bytes
font_01_sfnt_off000121dd.bin
044ffea6cd00d5508886d318790e9e9c2db84356385f103e9585232d98dcbab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 15736 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.