Malicious PDF — malware analysis report

Static analysis result for SHA-256 2442fddc64102948…

MALICIOUS

PDF

77.6 KB Created: 2021-03-05 08:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65bd91df90a98106a8dfe3e4733ddf6d SHA-1: 90ee6dbf461636cf441cdef527ca0b2bac510767 SHA-256: 2442fddc64102948d693b8342026752f81dd77a345fcade0c5df686a08192705
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=belt+of+tumbling PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368506/normal_5fecfb8f469c2.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/kamajube-bomimezewitiw.pdfIn PDF document text
    • http://positarinirib.22web.org/70846909805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_6023915b064c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_602ee4e484447.pdfIn PDF document text
    • https://vunusamonumated.weebly.com/uploads/1/3/4/0/134040658/wiwizo_dagitilugavi_mamepuro_vesorokiburobu.pdfIn PDF document text
    • http://vugijow.iblogger.org/ac_dc_free_vector.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/tozarujumofinu_waziwofofitofif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fcd860b9af45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivutunitilema.epizy.com/72456149536.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_f464f15fb437449d8b1cc7baece2e4c0.pdf?index=trueIn PDF document text
    • http://tefotesibeto.epizy.com/matevaworus.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/visual_basic_tutorial_for_beginners_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/saxon_math_course_3_written_practice_workbook.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_b80810c259fa4ccfad14d3fb6a6da576.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xurixado/zexubew.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/87038805295.pdfIn PDF document text
    • http://didevuxuwodur.rf.gd/57309089499.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/tufoku.pdfIn PDF document text
    • http://pawozif.epizy.com/learn_hiragana_worksheets.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_be1ea228442f4d13aaa1bb71293fdbc0.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 4792 bytes
SHA-256: 882e1f458bbd0ccd516e82fd9ce6c49bcefec7a2488dfb9857f5524fd803ee2c
font_01_sfnt_off000103eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EB 10952 bytes
SHA-256: 9a3691c91ddbf87eb09e414d42b917936da0816494f63ca629b176121fc0282c

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