Malicious PDF — malware analysis report

Static analysis result for SHA-256 99562494704cc216…

MALICIOUS

PDF

66.7 KB Created: 2020-11-09 18:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 231008025be1c4f8e4c428ef47a83d62 SHA-1: df54a2b22578d3d840cc0b84ffe1f945cca574dd SHA-256: 99562494704cc21677b4d7e4609c52f004da5423854b1b1f7da772a4ea5790c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?keyword=come+set+your+rule+and+reign+sheet+music In PDF document text
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/3080637.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/linadej_mozogepazuk_wejabegepemakis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_5fa8b5cf7ebcd.pdfIn PDF document text
    • https://widubemevojapo.weebly.com/uploads/1/3/4/3/134320166/xalexabotowukag.pdfIn PDF document text
    • https://lupilizeranal.weebly.com/uploads/1/3/4/4/134460298/tufuxomivanoxe_difedudozipidu.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/risunave-wobugar-bepavajug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f8e60e9565e7.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/henghuili-files/18744329387.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/northwest_coniferous_forest_dominant_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/fram_oil_filter_cross_reference_798576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4cb7729-0c7e-4b24-bdb1-746bf977c2be/nawasuxizined.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/radiant_space_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/10000_chinese_characters.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_off0000c8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D9 5360 bytes
SHA-256: 537d8c682d355ab8324ba824ec87b771a472e4f3a07b2bc01a9e4593c4cdef73
font_01_sfnt_off0000dae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 10304 bytes
SHA-256: 86558bcbabbdf18cf58425bd286c23347e1bdb66d41a8d5daceba458b42920db

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