Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddde14d9377030b9…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 10:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 88030fad8281c4aba33332fe38af4568 SHA-1: 633cc29db00f291e6540f46d11fc7f03eadec51d SHA-256: ddde14d9377030b9177022a5a0116d5fa996ad16c57e08c960fac2ee6b6bd7aa
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, 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 links are indicative of a lure to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wix?keyword=edgenuity+physics+lab+answers In PDF document text
    • http://lirerigoteses.22web.org/algebra_and_trigonometry_7th_edition_sullivan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_60559cc5d1520.pdfIn PDF document text
    • https://cdn.sqhk.co/madeparev/djghNjj/85300796276.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/41853244978.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/dhbhhgc/31242643502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_6031f9f780b99.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/consejo_de_participacion_social_seph.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/fJihggT/radio_new_york_live_stream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5ffcfda9a3f0d.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/73586366854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_603f0ee2c280d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_60314ca64b767.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/kasepagoriniramovabakum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesidif.epizy.com/kufebezabi.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/dell_precision_m6700_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2777c7eb-4a5d-44a4-b45d-1594439d7bc7/used_nordic_track_pro_ski_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/brujeria_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/adobe_photoshop_lightroom_pc_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac15b353-cfbd-4d49-b242-0c4204d2284e/72673122144.pdfIn PDF document text
    • http://dixuzudes.epizy.com/81481160925.pdfIn PDF document text
    • http://pijularof.epizy.com/burst_past_perfect_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/16107836223.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD473 5628 bytes
SHA-256: 2e27e9ca8556c93e41702c159220e3f716031508af742c3cc693f76d64dde2c0
font_01_sfnt_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 11292 bytes
SHA-256: 7d75694637369286f6451f546e5fac7f0773bf4be4da7ca280eb3d7b07603c9d

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