Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc680d0df23c89a7…

MALICIOUS

PDF

109.5 KB Created: 2021-03-23 12:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 545c3e9e6c7de487b1c50fd12239bf38 SHA-1: 497e155e2f91afe20a13f924119c33940b9fbfae SHA-256: dc680d0df23c89a713e3acfdaa4aa659eb33067f187a62cc4cc746bbb1f45ca3
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical finding for a mass external PDF link farm and ML classification indicating maliciousness. The document contains numerous embedded URLs, with one pointing to 'golowaki.ru', suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=metroid+nes+walkthrough+part+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382773/normal_604cb3dbeb35e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_600044a79b66f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_602b485482c4a.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/igjigh1/hair_shaver_prank_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/aggjb5w/lasizoradelofizarik.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/jageji.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/1iaifNr/vejasufadabukozinazunetuw.pdfIn PDF document text
    • http://tazaros.iblogger.org/jitiwebanilunorelepolexa.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/ginegawasirowuxozukex.pdfIn PDF document text
    • https://cdn.sqhk.co/jovuvufoxet/tidYoib/rujisa.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/lezut.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/fukezavazuj/16824127729.pdfIn PDF document text
    • http://janilemexe.epizy.com/lekomixirewaxasukife.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/beauty_plus_me_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/98096941484.pdfIn PDF document text
    • http://duvodix.myartsonline.com/vevakapuroveritebuxetuk.pdfIn PDF document text
    • http://lofukikusi.epizy.com/byju_s_learning_app_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/calluna_black_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/pirasexaz.pdfIn PDF document text
    • http://finubovuputok.epizy.com/xatifutijubonadomesapeki.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_c77f103b9de84eef9c3b00c54da3be9f.pdf?index=trueIn PDF document text
    • http://zewivijususilub.epizy.com/circular_polarization_of_light.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_e0ce181c3506411787ed9474b7dd58dd.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
    • 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_off000159d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D7 5432 bytes
SHA-256: df34f981cda15b6cef444c083bb1567b5f646e45df0bf07c8beec84625942f0e
font_01_sfnt_off00016c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C6F 11276 bytes
SHA-256: 59029c9ba1f876c9ec0af5a34b6cfb302d90be4fa7b32108794b2c2ad8e64f9b
font_02_sfnt_off00019314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19314 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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