Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea2626eaca856d8…

MALICIOUS

PDF

71.7 KB Created: 2021-03-20 04:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4cf0dc767a67dbb6a98cda5a8284fcc7 SHA-1: f70391900d51eee68ed77cec7bb60d834700416d SHA-256: aea2626eaca856d8915337b9da8b00e632fed4f3dd882b554587bbad6accff5f
194 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links, with a primary URL pointing to 'xajibur.ru'. The document's content, though obfuscated, suggests a lure related to 'Cayman airways cargo forms' to encourage user interaction with these links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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://xajibur.ru/123?utm_term=cayman+airways+cargo+forms PDF link annotation
    • https://fizobadajavene.weebly.com/uploads/1/3/4/4/134492874/dajirixeluwi-xizorefuv.pdfIn PDF document text
    • http://moymagazin.xyz/best_youtube_watercolor_tutorials_for_beginnersbxc07.pdfIn PDF document text
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/85b0b4a8d1f0c59.pdfIn PDF document text
    • http://kuvezowepo.scienceontheweb.net/basic_boxing_combinations_workout.pdfIn PDF document text
    • https://dikubudekoguzo.weebly.com/uploads/1/3/1/8/131857294/zodifatof-durot.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/84329446822.pdfIn PDF document text
    • http://mnclassis.org/wulisozeguvuzudtqfvq.pdfIn PDF document text
    • http://copyrightreports.com/annovi_reverberi_pump_partsq1xny.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/maverick_et-733_wireless_bbq_meat_thermometerl1n63.pdfIn PDF document text
    • http://stroymarketmetal.ru/zetarebuwatalejozosabomtub23.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/72377157740.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/9875756.pdfIn PDF document text
    • https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/2612545.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/australian_english_accent.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/journal_citation_report_clarivate.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/zalageje.pdfIn PDF document text
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_b1952617bac94cfbacf40b1b609f7c13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/lenovo_m92p_bios_beep_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/french_verb_conjugation_faire_passe_compose.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/how_to_clean_parts_of_gas_stove.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_fa00541409974394b638a29665a69ec9.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_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 5268 bytes
SHA-256: 37da52170247571a98259c288fe63252d67c65921a124b2b495e1dd6cc1f486d
font_01_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 10628 bytes
SHA-256: 7688cc801cd2f3b0648078fcc34c3c87a54457c716c844f71f3b82dfb3b8767b

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