Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe52e0096bb3347d…

MALICIOUS

PDF

73.6 KB Created: 2021-02-23 18:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a49befa235c5574e1378e8883e8c5a6e SHA-1: dd8ea86a4d5c2e1cdde075f8a984860413d5d18b SHA-256: fe52e0096bb3347dd7f3970ec83fecec0e781af2a01af1af96501e490391a1cb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, indicative of a link farm or SEO poisoning attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=glacier+bay+water+cooler+no+hot+water PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/19da48e8ae27.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/wuropizofo-lelelidebikena-maxapow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5fec38e37657c.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/wodizodofananefenu.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/wupiwupiwot/89157070282.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/vidijasedenolipozelevidu.pdfIn PDF document text
    • http://sunotewisutexo.epizy.com/residadonufitaborir.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/42832010723.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/84064322093.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/75753240982.pdfIn PDF document text
    • http://doxinaxa.epizy.com/mevepawu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/nuzenozumapubogitoku.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/56191008993.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/cardioversion_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/98699329584.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/fossils_and_geologic_time_worksheet_answers.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5076 bytes
SHA-256: a675342f193b3f5a2d75ab21fd4db01346b1958e4c1a01527792f500e24a1d32
font_01_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 10892 bytes
SHA-256: d1ea287575b2db2b14ef4d1650880e03cfd2440ceab7bb5e49ac3f6e41839ab8

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