Malicious PDF — malware analysis report

Static analysis result for SHA-256 16338995b8483a69…

MALICIOUS

PDF

31.8 KB Created: 2020-11-04 20:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7d1f6ea73e59348b85c040b61d7465d4 SHA-1: 61743b14f066dda76009b0e51dc3d66c6250e64b SHA-256: 16338995b8483a69ec07e70d3e0c666e2b22607906e1f0803c90547ed98d36f5
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to a URL that lures users with 'hobo 3 unblocked games'. This suggests a phishing or malware distribution attempt, likely using the document as a lure to download a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/123?keyword=hobo+3+unblocked+games In PDF document text
    • https://vovufopoxin.weebly.com/uploads/1/3/4/4/134466437/rizabuno_luvaduporatode_lavoniguzi_satinano.pdfIn PDF document text
    • https://nosuxiseliv.weebly.com/uploads/1/3/4/5/134578333/2286856.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/cf4d84f96f5.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/7a0dbdd0-d412-4b27-b3c1-8b7fb3d4c76e/kelurilowotosase.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/bottled_water_business_plan_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/the_sims_mobile_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/8388613033.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/59748925123.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/nordictrac_cx_938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6930f483-2cf6-4596-8ec7-9b9e31de8bbe/minecraft_weebly_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13a1f34-0b5c-4830-a1e2-bff9e0e56f68/jisazutubewedivekodetope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6381781a-04fa-4c25-b835-1bd2db05c1c8/75747464938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea2b4da-637d-4260-9aa7-9cd0f8f48112/73924619125.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_off00004100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4100 5492 bytes
SHA-256: fe250751b5ba3fb306e2fa5c9900a1872abea449c935b1188c46e696dae41217
font_01_sfnt_off00005398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5398 9472 bytes
SHA-256: 8ffb6f21bca4d32bb79ad7c3ae3511bb01919ac7b199ab766da6dd48a4448349

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