Malicious PDF — malware analysis report

Static analysis result for SHA-256 220523f2469c27fc…

MALICIOUS

PDF

83.1 KB Created: 2021-03-18 14:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a0f46cc0749e480fa08d5de9c7164faf SHA-1: 03ca6072d7c2ec449682ab9456b6738e88f57569 SHA-256: 220523f2469c27fccd9df1d0101484065fc498d8f689217efa832942669222f7
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs points towards an attempt to redirect the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=metro+last+light+redux+good+ending+save PDF link annotation
    • http://wiinorama.space/what_is_the_moral_of_beauty_and_the_beastw3m39.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/ibjbz1t/46036522904.pdfIn PDF document text
    • http://cashfree.store/define_contemplate_in_tagalogew4a3.pdfIn PDF document text
    • https://zozabamefopofa.weebly.com/uploads/1/3/4/2/134234868/suzujar_pesuvixud_musopasada.pdfIn PDF document text
    • https://zesadokalefon.weebly.com/uploads/1/3/2/6/132681767/julawefeg_babonorababize_tadelu_remaliloxoze.pdfIn PDF document text
    • http://usacreditreport.info/fubuwujepozubidoru4xzw.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/bejuvetugovu_sozivug.pdfIn PDF document text
    • http://pumba.fun/saguduzyppq6.pdfIn PDF document text
    • http://itclick.pro/65661292958b4ozb.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/hdKGheX/30099847748.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/jvJHvBF/55845753490.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/what_is_the_half_blood_prince.pdfIn PDF document text
    • http://supportcopyright.net/dizugupesikevuxagabwo59t.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/16732931994.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/3c40heo/volazuso.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/dofamavaxijagiparedida.pdfIn PDF document text
    • http://jilet1.club/lego_worlds_100_savewtj68.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/parisefupitubutisis.pdfIn PDF document text
    • http://pixell.store/xbox_game_pass_beta_pc_app91tem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d1db4d0-c196-4dd3-8d5c-bb108cafbd43.filesusr.com/ugd/479e38_7729c8d089934d05806e0d36f6005c2f.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_ba16645874184bc18fef2c5accfaa96b.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_fc96426211dd4b2a90d1d0bcf34cd828.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_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 5220 bytes
SHA-256: 1c3b1d5fa96cf910730afeaf0d26ab462f07a0411263d583c26e298db676047d
font_01_sfnt_off000117f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 11476 bytes
SHA-256: 41cba9976671f3a5f94d798c8f6cc089163862eabda1cfc6a5210b2a16957f49

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