Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d3d7a4554843fe…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 17:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a4e8ffc7c5b2582bf09b110a7af37111 SHA-1: 7fa98e20d5881f5087c69aa5fbc6bf7da875c922 SHA-256: 69d3d7a4554843fe605efcc844567d147d7c0895fc7585cdc108a2b4f7997fac
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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=counter+strike+source+non+steam++utorrent PDF link annotation
    • https://menimewutezosel.weebly.com/uploads/1/3/3/9/133997121/3a01ffd60ac16.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/5180854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419626/normal_60086d89e3c03.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/speedbit_video_accelerator_activation_code_keygen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_6028f2c6a5a49.pdfIn PDF document text
    • https://zanokelalugabu.weebly.com/uploads/1/3/5/3/135315143/f7ebabcb1e6fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_600245a3db8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_6018a6b2e5c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fd82a055ddda.pdfIn PDF document text
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/wifizunuraj.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/acer_aspire_one_cloudbook_11_hard_drive_upgrade.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/8942366.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/13149992822.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/the_mortal_instruments_city_of_ashes_movie_online.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/469b8a970280.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/how_much_does_a_assistant_manager_make_at_walmart.pdfIn PDF document text
    • https://vinunawamezod.weebly.com/uploads/1/3/1/3/131380031/9708430.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/how_to_make_poached_eggs_in_a_microwave_egg_poacher.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/c11b0d0d0efe48.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/cef497d.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/21196287869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/58745703656.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/java_jdk_8._25.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/3d_paper_garland_template.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/bill_gates_autobiography.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/dell_touchpad_driver_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/64853913433.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_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 4880 bytes
SHA-256: cd4717bd48f498e37a44cf93b3476af4f9f36e7a8d14b3be15cefdbad08e7359
font_01_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 10016 bytes
SHA-256: 04b6051b75d3fdd115ab90ba84ade5ccdf76e2911532494b499c46502c805fe4

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