Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5259712e8bbd93…

MALICIOUS

PDF

75.3 KB Created: 2021-02-26 13:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5082a31d4b8887ba3f7d6df87c63c0d9 SHA-1: 303be88126a3fcb6abe3f0f93ca53e8498fc2b16 SHA-256: eb5259712e8bbd939e30ddd795299a272c68abfb4391f56279e0de5cda3cc3cb
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jottigo.ru/award?keyword=how+to+find+the+choke+price', which is likely the malicious destination. The document body, though heavily obfuscated, contains text related to the URI, suggesting a lure. No scripts were extracted, but the PDF structure itself facilitated the malicious URI embedding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=how+to+find+the+choke+price PDF link annotation
    • http://oneitstore.info/ted_danson_wife_maryoki45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_5fdbd36523d09.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/35379923275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_6002869a13852.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/tijowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_603863393f3d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454436/normal_5ff21b1e8203a.pdfIn PDF document text
    • https://cdn.sqhk.co/jozanafe/hd5d33Y/lisobigoza.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/dEy3hHK/neguzugofevunawokivi.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/ggeZK85/mudulovesumep.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/resixexi/breakup_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/folivoguzudukilapibasus.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/33596377562.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/the_wonder_weeks_chart_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/pubumu.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_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 4940 bytes
SHA-256: d8816b5df57c2122b9ea252859382fbf735adc918e9ef2d0468081792439d219
font_01_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 10428 bytes
SHA-256: fdce36ed4f04147e0ad1abc31392720d75af068ee8323008540a656ffeb3adca