Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf6990571b0929d…

MALICIOUS

PDF

81.7 KB Created: 2021-04-07 13:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 366e9f542761ddde500620cfe4fc4e04 SHA-1: 2573bee6010c61f044c4256f612d126342148fe4 SHA-256: bcf6990571b0929df65ae77b1c5ca5c50eccde15a23e8599ead635c7cb4edc96
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this behavior. The presence of URLs like 'http://hotloveme.online/losixufogeerlzl.pdf' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://lozipotod.ru/strik?utm_term=el+peque%25C3%25B1o+vampiro+pelicula+2021 PDF link annotation
    • http://hotloveme.online/losixufogeerlzl.pdfIn PDF document text
    • http://prizinsta365.online/how_to_clean_angelcare_bath_support46rxx.pdfIn PDF document text
    • http://nudistoff.club/how_do_i_adjust_the_volume_on_my_roku_tvtk143.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/pasakamitotizogu.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/classifying_triangles_graphic_organizer.pdfIn PDF document text
    • http://zuwazekanusur.mypressonline.com/libro_de_cantos_para_difuntos.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/surokefesa.pdfIn PDF document text
    • https://pijafajabivigin.weebly.com/uploads/1/3/4/6/134635516/vevusuzes-povezetoluno-paboj-likaranirekigim.pdfIn PDF document text
    • https://zesawomu.weebly.com/uploads/1/3/4/3/134321331/952460.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_523e821cbadf46aaa134403cd5f9161f.pdf?index=trueIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_871f6c7c7c3346f980fa072386037d9b.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_7001c8fb06b3448980ca2739044b5478.pdf?index=trueIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_bbd40a8f769343bb9c2fed0bdb357530.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/310fbe6c-9008-4cff-aaa7-4725b2816bf8/27681732789.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_f4f67c9199f04007a14561bb4856d2e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de30fcba-1320-4915-9219-0bd8f73b780b/dilajuvijiworisikozunamet.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_ff68a52b01344fb8afdfe6fa7277b45b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d270d9a-1e40-4302-bf45-4fefa1679788/2007_jeep_grand_cherokee_3.0_l_diesel_review.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_2335dd721abe417799e7ee7c16939182.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5681a735-c8f7-4376-aa5d-4de68121ce43/28935275911.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_5b5b7490afff467098bce5566d71d6b0.pdf?index=trueIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_658172af9292486f91c4ce8d90d2d5d6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 5584 bytes
SHA-256: a358bd5deace6cb8f6e881a8b9a60bd9a44e7d4bfd8926dd89921b4961a0d734
font_01_sfnt_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 1896 bytes
SHA-256: 099d89093be102135c911a0e1d6cb497d4af1896e50bf9510546e5131dedf018
font_02_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 14108 bytes
SHA-256: 20deaf977c78251147b6df131c8fa18bb60b87c6fa89d41e2e1c2e938f6d9783

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