Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f20bc7cf26efce…

MALICIOUS

PDF

76.3 KB Created: 2021-03-26 02:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 746eacf9c3f5bb8caebfb6b73ed7f8f6 SHA-1: 587e68fe0a3f07d1f3a3033d382795154d24d858 SHA-256: 32f20bc7cf26efcef6c4f9b4cdb85a837201fe298bc4736b587b5289f8a56c5e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=henle+latin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374374/normal_6015fcbe6835b.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/aQ8gG5x/gufazixubilejisupumefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408485/normal_6001ca9dd906f.pdfIn PDF document text
    • https://farunekigevizaj.weebly.com/uploads/1/3/5/9/135976182/xesawiximuj_kamuzoj.pdfIn PDF document text
    • http://dorightunion.com/jajekerevurol70skb.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/vovuwusuzizonat.pdfIn PDF document text
    • http://winoorama.site/guwamonikarepegezutiz2dvw5.pdfIn PDF document text
    • http://yildirimotobursa.com/83665727316j92wx.pdfIn PDF document text
    • http://winepazijabubov.22web.org/5389535821.pdfIn PDF document text
    • https://nesaxelevamuzaz.weebly.com/uploads/1/3/4/9/134901400/947d618d3b7f.pdfIn PDF document text
    • http://sexesex.site/hermeneutics_definition_biblexgqnm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_605a9e93afadf.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/gexixex_jovofikez_fetapo.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/f39890ec19a31.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/Ew6Phab/narudejagapexef.pdfIn PDF document text
    • http://remontlegko.info/fetozezinucgyjt.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/idghhct/adobe_acrobat_pro_for_linux_free.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://dojopugoput.epizy.com/akira_full_movie_2016.pdfIn PDF document text
    • http://zozujuzozupu.rf.gd/oxford_picture_dictionary_english_russian.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_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 4400 bytes
SHA-256: 1a4c58ea3224a4cf020c5bde3e242582074fadae7f3634a3ad318af0b915a2d3
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 10436 bytes
SHA-256: 6a8e9b7a252ff988ec95c3f23bdc175f0062f6160cc027b2daa1a0a22f310408
font_02_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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