Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc503c3552675b8…

MALICIOUS

PDF

65.5 KB Created: 2021-02-13 16:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3759332fa4b36336c9909d5d07bd2b6c SHA-1: 462169586740bc3a26f5938e3916d26d7f5f1166 SHA-256: bcc503c3552675b865f48c088a2999fecccfe975397b02c7bf592037a7c020ee
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, suggesting it functions as a link farm or a phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=ming+hing+menu+florida+ny PDF link annotation
    • https://tujupanex.weebly.com/uploads/1/3/5/3/135333196/kipobogime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_6018364adcd4c.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/mawide-nuwukine-dolew.pdfIn PDF document text
    • http://otomail.business/tifadoverenikyk6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_6005e0b02f623.pdfIn PDF document text
    • http://eurozone.pro/five_nights_at_maggie_s_426uue.pdfIn PDF document text
    • http://golomashvanna.xyz/timex_clock_radio_t309t_manualgywnl.pdfIn PDF document text
    • http://titanovyi-filtr.ru/ziwesofixapopawowotawuso3272q.pdfIn PDF document text
    • http://totalcreditreport.info/fewisowinurekozagituguj4rqjv.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/vovax.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/0a3c50f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_601ab08b05c93.pdfIn PDF document text
    • http://sozetil.66ghz.com/citra_android_nintendo_3ds_emulador_apk.pdfIn PDF document text
    • http://nalapagized.22web.org/video_cutter_apk_old_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronogaso.rf.gd/application_for_consolidated_marksheet_in_madras_university.pdfIn PDF document text
    • http://rakorexifaxokur.rf.gd/kofunapuvadexa.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/10901195872.pdfIn PDF document text
    • http://worifazitinel.rf.gd/centos_version_7._2.pdfIn PDF document text
    • http://xelidev.rf.gd/bun_up_the_dance_mr_jatt.pdfIn PDF document text
    • http://molobexe.rf.gd/chromecast_app_for_windows_10_laptop.pdfIn PDF document text
    • http://kodosalepixalan.epizy.com/xaravegez.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_off0000c180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC180 5248 bytes
SHA-256: 238ea9710ec1fbca27070e4715e41ce8e55d4c5926a92c302321487cde4d56eb
font_01_sfnt_off0000d344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD344 10472 bytes
SHA-256: 7e24d362a15fc2563d5dd41f4fc154b6bda871a49e5a819b903337da2da6e507

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