Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf59ecc07f16d47…

MALICIOUS

PDF

75.9 KB Created: 2021-03-17 05:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e3f2c1086643cf9335db4064c946ddc6 SHA-1: 204cd695254bddcaed3ac900d0e298a25eafa870 SHA-256: ebf59ecc07f16d4767aab344b157669b2694e4a35ea8f6e1c8a75c5a5731a49e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. One of the primary external URIs points to a suspicious domain ('ponafet.ru') with a query parameter suggesting a search query, indicating a potential phishing or scam lure. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+pair+suddenlink+altice+remote+to+tv PDF link annotation
    • http://mevukavotidu.getenjoyment.net/ramawimupudolezopuwewob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_6046978b15a95.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/making_acrobat_default_reader_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410211/normal_5fdfac5b75b09.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/tirisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fdd5c18c9d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_60307a7c82f55.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/know_understand_do_common_core.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xipanizi.myartsonline.com/what_is_seth_gold_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/7318627755.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_9c9f28f9c96f4c569318beced61078ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/get_outlook_calendar_on_android_phone.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_0d44fc815c9f4e30a106a5945f0b3793.pdf?index=trueIn PDF document text
    • http://mojenuj.atwebpages.com/sazedevidenot.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/certificate_of_attendance_template_erasmus.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_7f251b4ec084478e970b7e54a8ada94b.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/adjectives_worksheets_for_class_4.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_521bb07bdaf646e7a0ab5c7f2ab5c923.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/beginner_bible_study_books_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/xunuwuga.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_ef9976d8d6f34d0387fe92b915118d7d.pdf?index=trueIn PDF document text
    • http://pavabiza.atwebpages.com/45412407734.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_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 5396 bytes
SHA-256: dc31307bab09008933d9ed5f047f60e9c0981f7a257918548cfeb92108d84e1b
font_01_sfnt_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 10316 bytes
SHA-256: 9adc62caf01094fcae3907b2e4d88ca80cdc8c9993f28a9e2cdcb25e65497b48

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