Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ef868cd29389fe…

MALICIOUS

PDF

85.0 KB Created: 2021-03-16 18:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4ad90c26b65195a25041110452c7141 SHA-1: 88e1959052916748d2570016027b91c5852de405 SHA-256: 96ef868cd29389fe7f7930085002e8451232f7887f66cd8a10dffc5f1a68674c
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • 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 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://dafemum.ru/123?utm_term=haridwar+ganga+aarti+song+free PDF link annotation
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/b453bbfdaf.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/6012074.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/nirexozoti.pdfIn PDF document text
    • https://fuzuvetidodevik.weebly.com/uploads/1/3/4/6/134637128/5558086.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/jejotelajo.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/329e2f2b2738e7.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/xifozotije_wesemixeziguse_jaluputosejov_jujodulitofeb.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/nopugegarogodokima.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/sql_server_tutorial.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/how_would_you_conduct_an_investigation_of_a_linux_system.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/6c98e6008a8ba.pdfIn PDF document text
    • https://kupifima.weebly.com/uploads/1/3/0/7/130775493/fuxakunubu.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/32761122143.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/47bd1029a25b72.pdfIn PDF document text
    • https://tixedasuke.weebly.com/uploads/1/3/5/9/135979549/2759637.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/xavebedaximir.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/terum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_f6919f802b3843a8843b2e961cdb579b.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_c72907802fc846389d6bcfffa78db9ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinezedu/jawukaminadawusafusosad.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_f56a2b87440a4837a8c59b8a0e4b5cc2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/fortnightly_budget_template_nz.pdfIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_cc873df9f98645f4a203f20f782ef831.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_fb0e09584b4347338fbb4cf39d76fe9e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 5096 bytes
SHA-256: df1d4eca252d6c3b504894e953bc3a0c76dbfe93633952795ad9cdea2446c715
font_01_sfnt_off0001220b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220B 11028 bytes
SHA-256: 3cd7177a56b845ec9456adaf2639b5491ee616bd7eb28b6b8ce12041868f0fc4

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