Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e661c058e8044e1…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 20:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ddbd5a00676d5f5c08c7d43cf93bcd76 SHA-1: e573f228001ab59adeeca9a382e2074300c472f3 SHA-256: 6e661c058e8044e1ec48c857856312c8e67e542ab0b9f8cb212c97f54db6dbbe
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

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 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/strik?utm_term=stock+market+after+hours+robinhood PDF link annotation
    • http://creditreportusa.info/94474451536lbmra.pdfIn PDF document text
    • https://wosufibataba.weebly.com/uploads/1/3/4/8/134866098/37d3de4789adda.pdfIn PDF document text
    • http://egrn-order.online/how_to_assemble_hoover_powerdash_pet_carpet_cleanerjkb23.pdfIn PDF document text
    • http://kieverts.xyz/bad_day_at_work_motivational_quotes1kl14.pdfIn PDF document text
    • http://fastcreditcheck.info/ripigusahftxe.pdfIn PDF document text
    • http://zakofuta.66ghz.com/best_monstera_trellis.pdfIn PDF document text
    • https://moxuvobojivoz.weebly.com/uploads/1/3/0/8/130873852/3844aa037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_22c4c9fa41494d4083dd0cc3d4548f1b.pdf?index=trueIn PDF document text
    • http://tedejokalegiruj.epizy.com/kememakulebem.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/galbraith_affluent_society.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/zitemofudonapezirefisilav.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/mudizapaguwanipudenawa.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_17e9599c8c634f738052f59952c80db5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/2301598565.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/boat_neck_blouse_cutting_in_telugu.pdfIn 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_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 5536 bytes
SHA-256: 58ae105269a9ef45de7e2f4752dcb32ba939d7dbeee80738eff2ef0d122eab8b
font_01_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 10784 bytes
SHA-256: f7fbc1dab6ecf486e4a0c54d131eb6f13dfecdb58bc4d20d9882d29778906e70

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