Malicious PDF — malware analysis report

Static analysis result for SHA-256 90100fc7882762bd…

MALICIOUS

PDF

59.5 KB Created: 2020-11-04 16:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac11be7964e1f1b3990efb61edfa0a40 SHA-1: 5c3d58a125482bf80939bd35c6b0e8eab547f1c7 SHA-256: 90100fc7882762bd2b7fa8526405692fe09b37a79e96235b0b264679c706d71e
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external websites, suggesting a link farm or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a potential phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

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://cctraff.ru/strik?keyword=besteker+video+camera+pdf+manual
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/324447b189434b.pdf
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5f9e82b5d15ad.pdf
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/8869537.pdf
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/1261087.pdf
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/kuneguxipod-xilazu-zivamogafumexu-fobugowabazadag.pdf
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/potosisuzarotal.pdf
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5f99087cac486.pdf
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f88a5bdc8619.pdf
    • https://mibonapa.weebly.com/uploads/1/3/4/3/134308174/e40065059.pdf
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/86825.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fasanag/24208967714.pdf
    • https://s3.amazonaws.com/kibavutibeved/inorganic_nomenclature_worksheet_1d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009dcd.bin
49dcd89098825e106ac489721fd607b96987d8b546360c411d863d98a25db270
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCD 5356 bytes
font_01_sfnt_off0000aff5.bin
1225c18a3de1713dc0f3bc9ecfe8399d19fa9ae3a1fa48da0f7343d6f1ac3bfe
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF5 10344 bytes
font_02_sfnt_off0000d31e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 4324 bytes