Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cab6fd8a934c02…

MALICIOUS

PDF

164.5 KB Created: 2021-03-29 23:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b0fa733162f791f51e4ee48d80688dd SHA-1: 8b2479164a7177de76b38ad1c1db93bd8ca4f4ea SHA-256: 32cab6fd8a934c02a0e30f890540897e096723db4841867893328ee8571cbca5
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were extracted, the presence of embedded URLs points towards an attack pattern involving directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://dugedepap.ru/aws?utm_term=aprendizajes+clave+primer+grado+primaria+formacion+civica+y+etica PDF link annotation
    • https://rafowatixi.weebly.com/uploads/1/3/0/8/130874563/5569567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424029/normal_5fff4d708ed93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_6052cbcdb03ff.pdfIn PDF document text
    • https://kowokilu.weebly.com/uploads/1/3/0/7/130740572/8307590.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/heUijd6/lol_zed_combo_guide.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/spoken_english_book_in_bangla.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/hfZFfdz/44961914884.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/rRBgio3/45333482615.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/BjdhdbW/20331191752.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/ahhjc5d/50602551196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_6014501d70379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377391/normal_5fe088746bffb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/what_was_vital_force_theory_and_how_did_it_decline.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_f1dd7444774c451ea10297557a59dfcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f84001-6dd8-4dbf-a00a-55008bf73ea2/rita_hayworth_and_shawshank_redemption_page_count.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_33dc496b5eda470bbddf3bff9b6aee1d.pdf?index=trueIn PDF document text
    • http://wobanunep.myartsonline.com/el_hombre_mas_rico_de_babilonia_online_gratis.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/firearms_and_ballistics_forensics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955aecc8-4ee5-4b9f-9623-0f154a853a6c/zumefadajawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa457dcf-92b4-4bee-982d-cb10c2189991/93801280974.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_fc22d1bde4a04125a63f0b6907e98f23.pdf?index=trueIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_ebc81714f1ed442e8230459343dbc442.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e234d040-84ba-4f14-98e6-6de273da356a/can_walmart_fire_you_for_being_pregnant.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://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_off00022c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C66 5752 bytes
SHA-256: 2e093bc0d0812d8291ea21fbaadf370be73ebae7b667297150eb3e63ecf9bc0e
font_01_sfnt_off00024009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24009 13584 bytes
SHA-256: 8dc8ed1ad8f7e0644406cc02610c55867f1cac421f4de557bbf9222589e82754
font_02_sfnt_off00026b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B8F 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e