Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae7e1782ceefad4…

MALICIOUS

PDF

68.4 KB Created: 2021-06-06 11:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 08554c5a1633003557df483626c39c8f SHA-1: c9ebd74f0a05c4c8ffc7f5ccc650c99e7b021e67 SHA-256: 2ae7e1782ceefad4c44a4b0658a0658b6d86da39565769862d22393e506796e7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. ClamAV and ML classifiers confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/pbw?utm_term=libro+de+formacion+civica+y+etica+2+de+secundaria+serie+infinita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417986/normal_5fda4aa7ad32e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427498/normal_5fff92b78ef88.pdfIn PDF document text
    • https://bomefojidog.weebly.com/uploads/1/3/2/6/132695402/1009d5010cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446923/normal_60696b2c36f70.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/3505cf12354e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_603a536c7203c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe819b40f836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_603c18e33f367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5ffcb23031dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6023c820986cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_604914f60b0a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_603bf4e7127b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f803ded-3da0-407d-b68c-6df4d7436e48/39799848448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5416d6d7-4b03-4666-8e76-acc445f3d22f/bixexugugokegasik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ff4483-56cf-4a2e-8695-6375e5c88722/gagijiwilolejik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c83a3d3-2710-41a0-9ec1-5cf56ae408ec/lista_de_verbos_regulares_en_aleman_conjugados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5ccde5-ba7d-4035-b89c-a7857114b106/what_is_a_patient_chart.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_off0000cb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB28 5508 bytes
SHA-256: 078f1650c495bf6976f1dc0e1555841d29b9fffcbc71ad523163f0a1492c4540
font_01_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 10696 bytes
SHA-256: da37384d1046fb613f5beb39bd4bb6ddc0af0c80fb590367bbae718cf9635c46

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