Malicious PDF — malware analysis report

Static analysis result for SHA-256 af582a1cbb0b6e97…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 03:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6047fd3c40c8fd1dd3ccc48b0ef61b00 SHA-1: a59c928973220ffc2e2b3ff6447140f3b0549391 SHA-256: af582a1cbb0b6e97e0a3964087d84eb31502b3250a663d7bf1ad43ce7c754d9a
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/123?utm_term=ben+10+omnitrix+notification+sound PDF link annotation
    • https://pexiseziburenof.weebly.com/uploads/1/3/4/6/134685472/ddf8a8c197.pdfIn PDF document text
    • https://fifukujujaki.weebly.com/uploads/1/3/2/6/132680890/6132f2d54.pdfIn PDF document text
    • https://nuvarimo.weebly.com/uploads/1/3/1/3/131378817/ba3fe.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/anorexia_nervosa_articles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_602a1ec3352f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_602a53561bce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fe690f2f2294.pdfIn PDF document text
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/favotofudem.pdfIn PDF document text
    • http://zapazereti.22web.org/928019989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_bc02a1173ddc42bea84873930498c01e.pdf?index=trueIn PDF document text
    • http://wojobawezelo.rf.gd/nuwotoligapivexutije.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/asme_a17._1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/das_principles_of_foundation_engineering_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/52592590695.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_74ae0b4338f64e649a11fdf7a9659abf.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_efd9ad8aa9ab409d84f6822f8595f899.pdf?index=trueIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_a07f3e7855ba462891356a3175056e34.pdf?index=trueIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_fa395241660e432d91a117b5c2a3de4c.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_377d39b23bfa4b649b537b08adc10e64.pdf?index=trueIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_8115e268bdf24656b2411ed6be46cd63.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_9a38a728ca9040baa6da9df07d5fd683.pdf?index=trueIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_3ead6cad9e3a472d8791514e214c4343.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/understanding_cryptography_solutions_github.pdfIn PDF document text
    • http://safinunel.epizy.com/sejokometesaku.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_de76bc26d67541eb9f8a52a97f592430.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 5328 bytes
SHA-256: 733591368603bad3d5e6dd7d3637be3764aa4f5da3137d081d446c5358789910
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10748 bytes
SHA-256: 6da3b1e1840a306078ab3031526b10e97f4946c342f2566bb3ddc2c9ccf282bc
font_02_sfnt_off0001241d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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