Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46cf41a7432e5a5…

MALICIOUS

PDF

96.6 KB Created: 2021-04-01 12:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 22b20b44c9f73b3d22eb114ba34c15e6 SHA-1: 0040a89a9b7b9f4c1d6dc1a6d82572237785ea2c SHA-256: b46cf41a7432e5a55c6ef671365197fad80699dbaf6c66984922ad0a80e4133a
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent. The document body is heavily obfuscated, but the presence of links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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/award?keyword=protestant+bible+in+urdu+pdf In PDF document text
    • https://limejanokevipa.weebly.com/uploads/1/3/0/7/130739330/wezipolofowaf.pdfIn PDF document text
    • http://litamomun.22web.org/graphing_logarithmic_functions_practice_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fcebd403660d.pdfIn PDF document text
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/dakexuxa-vaxosonasika.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/zugarofuk_sivudamaxub_panuvuzuv.pdfIn PDF document text
    • https://mikezibe.weebly.com/uploads/1/3/1/4/131453119/lezekepogasezowabad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489843/normal_5ff1cf19782c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_605796f2f20d2.pdfIn PDF document text
    • https://xibupitosuxusi.weebly.com/uploads/1/3/1/3/131380094/58d6617e1c2b6f.pdfIn PDF document text
    • http://finovadi.iblogger.org/khaidi_babai_telugu_songs_free.pdfIn PDF document text
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/6ee3d8680247b71.pdfIn PDF document text
    • https://gijejutet.weebly.com/uploads/1/3/5/9/135974865/dorusiw.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvotawelotito.epizy.com/tuzegavosifo.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/diary_of_a_wimpy_kid_movie_online_fmovies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41bed2c-2190-444a-8d42-a6091508c99e/ap_chemistry_balancing_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/firuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/64413688664.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/78302224739.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/nigemurupatimugipinutibez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8314505d-3f49-405c-b459-a3f4be41c51d/samsung_smart_tv_50_inch_price_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/sefovijakekeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d4ac81-5ac0-4656-8e15-1bec896800c8/xfinity_dvr_box_says_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b600264-205d-4d4e-99ec-489f5b1f3d09/what_does_it_mean_to_have_a_representative_democracy.pdfIn PDF document text
    • http://ganiwozipowure.epizy.com/hi_point_45_carbine_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40997c3d-00e4-4551-ab27-a3764401e925/widivimojasoti.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015ab1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15AB1 7240 bytes
SHA-256: 0ee612c24a8bed7fe7f7f78a2c0ac22d4737e5da4abe9b8c81b8643ac9a24cad
font_00_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 5176 bytes
SHA-256: 236e6e21b3221ef1578b050dcb8b1be89f91e1e6d5969ae9cca398defc3740d7
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 11012 bytes
SHA-256: c66713a7fdec0cc61525f26118cf6504f90f65672230fd45eacb334209cbabe2
font_03_sfnt_off000136b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B9 21380 bytes
SHA-256: d69b32b64be94342140a87a93ba42d2d04f929f6d16a937620075cef5281578e

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