Malicious PDF — malware analysis report

Static analysis result for SHA-256 77de5abd1a1ef1d1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-28 02:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6052dbfae1238ae2f9b25a88d7d2835e SHA-1: de94f21c6a3627d7f7d34762f968d859e000214e SHA-256: 77de5abd1a1ef1d106e00c3bb8edb7d0db177b878eb35c82563df4ae7b5f25bc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a compromised site. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=rosslare+access+control+manual+pdf PDF link annotation
    • http://voseboler.iblogger.org/86461246368.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/linda_goodman_love_signs_read_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_60190980302ca.pdfIn PDF document text
    • https://nobametu.weebly.com/uploads/1/3/2/7/132740930/suxaz.pdfIn PDF document text
    • http://pay-order.info/how_to_find_grades_in_google_classroom3z921.pdfIn PDF document text
    • http://rubeatyshop.xyz/how_much_is_infinix_note_6_in_kenyau6fpd.pdfIn PDF document text
    • http://wugafis.66ghz.com/73838832725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_602bebdf0885a.pdfIn PDF document text
    • https://mokaleje.weebly.com/uploads/1/3/4/7/134732408/golimojob.pdfIn PDF document text
    • http://usmileofficial.site/file_manager_apk_download_for_android_tviaba5.pdfIn PDF document text
    • https://xemalijojododud.weebly.com/uploads/1/3/0/9/130969235/9953901.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/rulax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60303b692baa0.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/kasuzudapifesiririn.pdfIn PDF document text
    • http://5coupon.info/ejemplo_de_manual_de_organizacion_y_funciones_de_una_empresa_comercialigp1j.pdfIn PDF document text
    • http://websporizle3.com/algorithmic_trading_strategies_pythoneqmqz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxifiv.myartsonline.com/mediduzefunibawe.pdfIn PDF document text
    • http://romisov.epizy.com/bonafinetebobevovagopego.pdfIn PDF document text
    • http://zulebolaj.rf.gd/81343143139.pdfIn PDF document text
    • http://bejopobu.epizy.com/bandmaster_offline_version.pdfIn PDF document text
    • http://dodixuvizovov.epizy.com/88971834472.pdfIn PDF document text
    • http://wuboxobotuz.rf.gd/ew_bullinger_companion_bible.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_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 5308 bytes
SHA-256: f0fcc0e4682b198cb2cc1201a94ec50fd1c23b1e5f71f0ae93e0827e682b0f18
font_01_sfnt_off0000f78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 11460 bytes
SHA-256: b30b3e9e1a1e4193f53474bd2ae655e59484c0a943218883874e3bf5965ddf80

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