Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0a1ae01a5e2ccf…

MALICIOUS

PDF

62.1 KB Created: 2020-11-05 03:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 30efc0ec1ccfed57bd6fd23b480997fe SHA-1: 1891fe5a4f460b25be10204657c4c77a26fe7aa8 SHA-256: 0f0a1ae01a5e2ccf92f3353040492760b3c29adb76f2343bb3a3516f215d79b6
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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/strik?keyword=words+that+begin+with+xo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f950d473fc91.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/51b726e5bea2157.pdfIn PDF document text
    • https://lizapomed.weebly.com/uploads/1/3/4/5/134511268/d7053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87d8369b4b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f9e9538e5dd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420911/normal_5f992e51d8bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450418/normal_5fa32c4407717.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/wiwuxot/brche_multiplizieren_textaufgaben.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/la_vida_contemporanea_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/22622067737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63f8b28-0660-45b4-a3b5-e676e9da1b18/modizejajudopaweguw.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_off0000b61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61E 5368 bytes
SHA-256: b33e896260fb4fcc7abe6fb4ee78c2796f54ab5e8ab80f3f4fc43a41de1b60ae
font_01_sfnt_off0000c874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 10348 bytes
SHA-256: e687508c318e6e044c5626945e9c73657f1b4e78110ed214d7a2adf6e932feba

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