Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1b5be94fe6c08a…

MALICIOUS

PDF

78.2 KB Created: 2021-04-04 09:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 60ab3c9b0f04765c650ce3d1a9fbabf3 SHA-1: 9532dd748631380ce4aa940f28a81f651e2326c4 SHA-256: 4a1b5be94fe6c08aa2e8cb5978aa416b71c091bb11296d8f11dfb1f689627789
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=titanium+tv+apk+download+for+android+phone PDF link annotation
    • https://filokizufotol.weebly.com/uploads/1/3/4/4/134455434/soxatijefo_farosebij_wofixoladefiwi_surebon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_6058b114e7fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_603af2d956bfd.pdfIn PDF document text
    • http://xajoxirutojik.iblogger.org/complex_numbers_worksheets.pdfIn PDF document text
    • https://savejoxip.weebly.com/uploads/1/3/4/7/134722189/6195918.pdfIn PDF document text
    • http://rexirututesopew.iblogger.org/what_is_the_difference_between_samsung_qled_models.pdfIn PDF document text
    • http://sulalaketukabox.22web.org/core_java_basic_concepts_free_download.pdfIn PDF document text
    • http://zodezabazigojab.iblogger.org/windows_keyboard_shortcut_to_maximize_all_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wuzitipajupenok.rf.gd/tawenoboxedowofawusaw.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/nakenimipesasijanizi.pdfIn PDF document text
    • http://sisumufavezawa.rf.gd/allium_sativum_chemical_constituents.pdfIn PDF document text
    • http://saniwetilufi.epizy.com/actual_cannibal_shia_labeouf.pdfIn PDF document text
    • http://tinasixubu.epizy.com/pes_cavus_deformity_causes.pdfIn PDF document text
    • http://wawebepibalura.epizy.com/cours_de_l_amnagement_du_territoire.pdfIn PDF document text
    • http://junebipizazob.epizy.com/wamipolu.pdfIn PDF document text
    • http://duxurajixi.rf.gd/libros_de_jorge_baradit_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5152 bytes
SHA-256: e8fcda87fc472cc63399cdf0aa9f354254a6ebf359bfb16a6b5960db207f2259
font_01_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 10952 bytes
SHA-256: 8655c6d7a70cb6f4b9ccef611b04c3e2bc2289df44fb68f74bc8da375c0a1c58
font_02_sfnt_off00011da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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