Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83262cbe19490d3…

MALICIOUS

PDF

33.4 KB Created: 2020-10-31 04:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0162d2d5326cbc1c1016de1127e4bbb9 SHA-1: b68307da3632340fd5e807a2befb2db03cdd6335 SHA-256: b83262cbe19490d3f72c61356e1da9ffa195c871923d2044b81bf4dc7e37511d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?keyword=central+york+school+district In PDF document text
    • https://walinakonefal.weebly.com/uploads/1/3/4/3/134316097/julozokago_weboxugu_migimepulisawob_binixapasat.pdfIn PDF document text
    • https://zupuxugemewizo.weebly.com/uploads/1/3/4/3/134309945/pulewodoxutape.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/kidojijewanov.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/nabikagu.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/vipufupujexusop_tovazusebep_wavatavixujuv_zoluvutumeb.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/vaguxegurakedibosuz.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/8b4b845b-ce43-40ca-8cdd-cd8ba4025200/tavobexad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7423/9646/files/noxotisaxidixerisaruse.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/salesforce_email_template_attachment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02dd022b-daee-45cb-b526-a8fa76641c4d/13409255039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/active_to_passive_exercises_b2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/rainsoft_water_softener_ec4_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/williams_flexion_exercises_for_sciatica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8214/3639/files/tilozepuxifavi.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_off0000489a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x489A 5100 bytes
SHA-256: ed7147e25ae6db30391964d9c6a946e66257107c2c61784fd0ef9ca84be5d351
font_01_sfnt_off000059ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59EE 9008 bytes
SHA-256: cffbf35bf0012e5deaa32b6e605de98b2dd356f9ce9796e4418a681dd8b99051

Open this report in the interactive analyzer, or submit your own file for analysis.