Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a756366b4a19e1…

MALICIOUS

PDF

40.0 KB Created: 2020-11-09 10:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ad98a7c5a5a0f71bc5d8060f8282d1b2 SHA-1: 7e7bec24b114f7911f947ef9874258d90cf6bc6a SHA-256: a0a756366b4a19e1e6398ecd7bac36182c053b3e209226ba35b0afd0d9b3abfb
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://traffking.ru/aws?keyword=acura+tl+service+manual+pdf', is identified as a known malicious redirector. The document's structure and the presence of numerous links suggest it is designed to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffking.ru/aws?keyword=acura+tl+service+manual+pdf In PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/658aaf1.pdfIn PDF document text
    • https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/nuvika_kelani_vesazed.pdfIn PDF document text
    • https://xiwitewikilimav.weebly.com/uploads/1/3/4/3/134371529/wunajakij.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/2211750.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.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/sedimeraxufi/biografia_de_anibal_barca.pdfIn PDF document text
    • https://jojabowux841055970.files.wordpress.com/2020/11/kestrel_in_spanish.pdfIn PDF document text
    • https://nexopasel.files.wordpress.com/2020/11/oracion_de_manases.pdfIn PDF document text
    • https://tetekezulax.files.wordpress.com/2020/11/boruto_dub_movie.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://luvomax.files.wordpress.com/2020/11/31842874506.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/tezazivosafirivevir.pdfIn PDF document text
    • https://jufifel.files.wordpress.com/2020/11/klein_organic_chemistry_2nd_edition_solutions_manual.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_off00005e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 5352 bytes
SHA-256: 87ebaed1617bfd6a90caf5028b382568e3fddf1acc74024c8f92f4f932eeb36f
font_01_sfnt_off0000707b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 10312 bytes
SHA-256: 1548473b16a9062d27286dfafea8beae609ef2087ba7d71c0fc376a3766620ec

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