Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcef2c2aa5a0ca3…

MALICIOUS

PDF

70.2 KB Created: 2020-12-08 07:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2d35d0a9a8e7cf6f6d5b5bc06853c5b1 SHA-1: d0f017fd1bead079aaecf2f1e24505ac1bb72214 SHA-256: 2bcef2c2aa5a0ca3543f216aa06f46293c271324921c3df824ff92afa1d64713
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure users to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=hip+extension+exercises+crossfit In PDF document text
    • https://wogilaxafa.weebly.com/uploads/1/3/4/4/134479860/61a409b9f30e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f9968c1bd589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5fc8c19222ec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fcefed6e152d.pdfIn PDF document text
    • https://kugakisan.weebly.com/uploads/1/3/4/3/134390280/9333174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1559bc6d9645836252c59/t/5fcc01b5eb18547f4b700642/1607205302366/tft_set_4_zed_spirit.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/13656866091.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294ce7848ba205d234ec5/t/5fc920cab208cb00f40908f3/1607016651001/diaphoretic_pale_and_anxious.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b93d7a4-4803-46ec-855f-4b7782e90929/kapijixaxasafewogedisi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2983b9955c744b5466208/t/5fc412e6eaf37e3b641bf23d/1606685414312/91769210054.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/yahoo_email_pop3_settings_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/64092806688.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d0288139af0376575e17/t/5fc9849cd7c3040d8727af48/1607042205631/medicine_reminder_alarm_watch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fca755f8e8fba586e5eee11/1607103839867/fallout_shelter_cheats_2020_pc.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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 4796 bytes
SHA-256: 58c3348eb814cad5fd43d26d9a6523c255b82232f6b88bf54d314f8d17496251
font_01_sfnt_off0000e98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 9936 bytes
SHA-256: 019eae4d4fd1c8465b70e5bcb210fbcd4e1fef70dcb7bf835e1dc38f7ce9896a

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