Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cc49b6a2feacf2…

MALICIOUS

PDF

69.3 KB Created: 2021-03-17 14:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3ec7444b676795ffdd7cf3366d46391 SHA-1: 9c2b87726a84f267c600978130944bd1b9a826c2 SHA-256: c7cc49b6a2feacf2b64ee09ed088f9199954f1c8b7c18f3005d2ed5fffcc73a0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=how+to+connect+bluedio+turbine+headphones PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5ff9204594507.pdfIn PDF document text
    • http://ruwegekugite.22web.org/tafisotikujukexerelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fdf543c5a22d.pdfIn PDF document text
    • http://vodoroding.info/84675379202z94zw.pdfIn PDF document text
    • http://1fps.ru/94233150325s534w.pdfIn PDF document text
    • http://papotupeti.iblogger.org/cisco_hsrp_configuration_guide.pdfIn PDF document text
    • http://pokemonrivals.online/convertir_pulgadas_cuadradas_a_metros_cuadrados8mfwp.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/zidowubab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fdbe4d83ea70.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/c_language_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_5fd774a907801.pdfIn PDF document text
    • http://usesalle.xyz/adobe_photoshop_cc_training_videos0dum2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_0a2935d9667b4d78ba7e5f21930a76e8.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_db7451b2578949e7a86f639ee77d977b.pdf?index=trueIn PDF document text
    • http://lekodabiwizu.epizy.com/zefapugolilefada.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/lifoba.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/fexolujesitosolomemeweri.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_a3291af46406413a8cbb61b45d4c81c2.pdf?index=trueIn PDF document text
    • http://jeborawaleko.atwebpages.com/17849397037.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/inventory_sheet_template_word.pdfIn PDF document text
    • https://d934ed86-632c-4751-b35b-4303166f997e.filesusr.com/ugd/be0f55_b32c9e7d591146d2ad7359281b1d6bd8.pdf?index=trueIn PDF document text
    • http://kapirexazi.onlinewebshop.net/17328561508.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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 5356 bytes
SHA-256: 22dedb8564795b259d372e122dd53616431b9055357dd5d68787264062e975ab
font_01_sfnt_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 10576 bytes
SHA-256: 57f7838f2e859da45f508278abef8d5350f2ec6026ab32bd10f82a5ad4d2c690

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