Malicious PDF — malware analysis report

Static analysis result for SHA-256 47eec65507adca4a…

MALICIOUS

PDF

73.2 KB Created: 2021-04-14 08:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4614c60fba8ff4ec304145060d0fc7df SHA-1: 7ed20b1d77cdcfdc4f48f9de95d846dd3ee4ff0d SHA-256: 47eec65507adca4aa7c382731f0f94e74165cadd2cf3ec9bde82c43344bba348
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors, indicating a link farm designed to distribute malware or phish users. The heuristic firings, particularly 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM', strongly suggest this malicious intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+get+hp+printer+to+scan+to+email In PDF document text
    • https://turulogir.weebly.com/uploads/1/3/4/6/134641543/298aeacc1621124.pdfIn PDF document text
    • http://copyrightram.net/how_to_reset_ipod_nano_7th_generation9v5bb.pdfIn PDF document text
    • https://joripirido.weebly.com/uploads/1/3/0/7/130776040/1268629.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/42235496666.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/3659905.pdfIn PDF document text
    • http://italia-doc.fun/dnd_3.5e_players_handbookult8a.pdfIn PDF document text
    • http://sodahq.pro/38230675109pv590.pdfIn PDF document text
    • http://wacc-cat.org/29522151979v666i.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/6707985.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/notes_on_camp_met_gala_meaning.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/kafises/kenmore_70_series_dryer_heating_element_home_depot.pdfIn PDF document text
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_bf32435e575541ad86cfc3852eb717b2.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_1bb95697d1064fbe815e34a1be5b1b0a.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_c8bf1a599c5d49a3b68e37613d4dd796.pdf?index=trueIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_b43b874d72174851af4aee10c84e57ee.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_35a43f3799c94e47b802f721c0a87a41.pdf?index=trueIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_cded2adbdb3844a6a00cbdd002e6cf03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posufij/antalyaspor_formas_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/algebra_worksheet_for_class_5.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_00cf7ea44e2f4f8a90891d5a0bb1a5f6.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_faa45ba1faa749d3bb6fa85e0a0cb221.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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 5400 bytes
SHA-256: c7d3c2ca361066c8113c3b14354e2d2b47119d23414925537d4000b860c2fa49
font_01_sfnt_off0000f2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C0 10700 bytes
SHA-256: dfdd5f4abb209eaa58e024ab77a35c2041a566c81882f85d0dd245ac5a6a14ea

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