Malicious PDF — malware analysis report

Static analysis result for SHA-256 5215dbcf7de1a3cb…

MALICIOUS

PDF

41.2 KB Created: 2020-10-03 04:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ba29248d1452b75c2687287e49b2697 SHA-1: dde9a4d954a24cd14d8c6f3656cc16ecca8d426e SHA-256: 5215dbcf7de1a3cb815ad3adadabe1a8ec153bf7b2c1159c4c135aa6ae0d452c
154 Risk Score

Malware Insights

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

The PDF file contains embedded links and a document body that mimics a technical support or service error message to trick users into visiting a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary URL leads to known malicious infrastructure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute 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=bell+fibe+tv+not+working+android In PDF document text
    • https://site-1040297.mozfiles.com/files/1040297/likekidewogukataloze.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/lunoganesa.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/pewiravebiso.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/bujebexumapeb.pdfIn PDF document text
    • https://site-1041085.mozfiles.com/files/1041085/76942716940.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/51652654764.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/9238872903.pdfIn PDF document text
    • http://files.padovecote.com/uploads/1/3/1/3/131398144/ranebodu.pdfIn PDF document text
    • http://patozite.laurabain.com.au/uploads/1/3/2/3/132303189/27919cb9269.pdfIn PDF document text
    • http://files.lucypetersonwatkins.com/uploads/1/3/0/7/130775528/2324679.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4842/7671/files/minecraft_command_block_teleport_to_end.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/des_moines_christian_school_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/52398649576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6921/7699/files/doom_strategy_guide.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_off000061b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 5304 bytes
SHA-256: b502b5e745d1cbbe3deeb73c17e95f8c91a421cb88bdb32cc6ed25d93a92c87c
font_01_sfnt_off000073e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E6 10364 bytes
SHA-256: a6654a13b87b126ae696d14659f32b88921a2190095b2498ee8b89422fec7de4

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