Malicious PDF — malware analysis report

Static analysis result for SHA-256 127322947a072054…

MALICIOUS

PDF

74.1 KB Created: 2021-09-20 22:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2ad70f277d2c0082027a77a49496c3a0 SHA-1: 484be84f8c50eac92d3fe3d57cc76f00b1744c9d SHA-256: 127322947a07205440523414cec3f087ca87879f70ed2fdddbba8c877296796c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution.

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
  • 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://philabc.ru/uplcv?utm_term=killer+queen+roblox+id PDF link annotation
    • http://thetsaban3watnuea.com/UserFiles/file/mabutiwubupijudomerizup.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/56620997248.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/99696853334.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/dijixila.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/83404040177.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/xonifam.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/zozatuvilurufaxawo.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/zesofomoduwabeve.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/vojuge.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/poluvu.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16140015cb0aa6---53762211972.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/60347323386.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/jerunonamuzozapemirurute.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/89728083938.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/16845706871.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6561997fb---98095076198.pdfIn PDF document text
    • https://architektor.ru/uploads/file/zuburoxan.pdfIn PDF document text
    • http://geraldinekilkelly.ie/pofirelamifakevofavive.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/gebeditumuruteledinasage.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/53144570557.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/90798616312.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF79 17312 bytes
SHA-256: 15277ec49d48650e548bc35053a2cffc80ace3fb13189773231faca9b01ad59d
font_01_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 10292 bytes
SHA-256: 1e07fbf5a3835faaac9e8198a74d61bafdcfb5f7e90f2533aead4a826b43165b
font_02_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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