Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9742d95e18528ab…

MALICIOUS

PDF

82.9 KB Created: 2021-03-02 22:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf2b94d78401a2101acda6112d9a0315 SHA-1: df2d11e26251fb59ad277536e38026714e38f83f SHA-256: f9742d95e18528ab21fa4ef0fd2d3bbd44f6e6585a56a7ae61032fde127fc4f3
74 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a high number of external URIs and the 'disposable hosting' heuristic suggest the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The document body contains generic text that does not provide specific context for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://jumiwimov.ru/123?utm_term=is+fitbit+versa+lite+compatible+with+android PDF link annotation
    • http://sibuvre.com/bhajan_aarti_ringtonefmxyz.pdfIn PDF document text
    • http://apple-fruit.space/771687675376hhxl.pdfIn PDF document text
    • http://ipoteka.net/904534604853kk6k.pdfIn PDF document text
    • http://lujoxowuri.iblogger.org/e_aadhar_by_name.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/mezevumalazijabidu.pdfIn PDF document text
    • http://mazafaka69pussy.online/shimano_ultegra_di2_6870_2x11sp_sti_shifter_set7oid9.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/zudoziga.pdfIn PDF document text
    • http://populiro.iblogger.org/nice_guidelines_hospital_acquired_pneumonia.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/56954357134.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/rezekakeji-tadavi.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/8a0b81b94.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/tenom.pdfIn PDF document text
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/57bb81342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanoxujam.epizy.com/gegeli.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/bodyweight_workout_app.pdfIn PDF document text
    • http://woxariwete.rf.gd/zitujisisona.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/avengers_game_apk_data.pdfIn PDF document text
    • http://vosimamasi.epizy.com/tourist_information_center_ne_demek.pdfIn PDF document text
    • http://wewegojaj.rf.gd/6982399114.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/98690971044.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5624 bytes
SHA-256: 2c2c7760880ba16af719066714a7455b59cad18d7de0d7227fd3124319e1e723
font_01_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 10908 bytes
SHA-256: f58e882a8689377aeb0c1b24d896aa3b77d84835e60f4e92f7cc46c6f7e156d8
font_02_sfnt_off00012820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12820 16208 bytes
SHA-256: bfe3ecb8724c31a661001150f7bfcdb835dac4180e689e70ee3f5f04908dd57e

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